Area denial weapon
An area denial weapon or Anti Access/Area Denial weapon system is a device or a strategy used to prevent an adversary from occupying or traversing an area of land, sea or air. The specific method used does not have to be effective in preventing passage as long as it is sufficient to restrict, slow down, or endanger the opponent; some area denial weapons pose long-lasting risks to anyone entering the area to civilians, thus are controversial. In medieval warfare and sturdy stakes were buried at the bottom of long lines of ditches, pointed end up diagonally, in order to prevent cavalry charges in a given area. If the stakes were spotted, soldiers would be forced to dismount and give up their advantage as cavalry as well as becoming easier targets; the correct layout of these extensive lines of ditches and the quality control of stake size and placement was part of the craft of war. A more modern version, allowing quicker dispersal and providing the advantage of being hidden more are caltrops, though items bearing close similarity had been in use for most of antiquity.
Many variants were used, such as boards with metal hooks, as described during battles of Julius Caesar. Passive fortification—ditches and obstacles such as dragon's teeth and Czech hedgehogs—were used as anti-tank measures during World War II. Simple rows or clusters of sharpened sticks, the use of small caltrops have been a feature of anti-infantry warfare since antiquity. However, due to the difficulty of mass-producing them in the pre-modern age, they were used except in the defense of limited areas or chokepoints during sieges, where they were used to help seal breaches. Increasing ease of production still did not prevent these methods from falling out of favor from the late Middle Ages onward. Caltrops are still sometimes used in modern conflicts, such as during the Korean War, where Chinese troops wearing only light shoes, were vulnerable. In modern times, special caltrops are sometimes used against wheeled vehicles with pneumatic tires; some South American urban guerrillas such as the Tupamaros and Montoneros, who called them "miguelitos," have used caltrops to avoid pursuit after ambushes.
The most common planted by hand or dispersed by artillery. Some modern prototypes experiment with automatic guns or artillery-delivered ammunitions that are fired only after remote sensing detects enemies. Booby traps or improvised explosive devices in sufficient concentration qualify as area denial weapons, though they are much easier to clear and pose less long-term danger. During an armed conflict there are several methods of countering land mines; these include using armoured vehicles to negate the effects of anti-personnel land mines. Land mines can be cleared either by hand, or by using specialised equipment such as tanks equipped with flails. Explosives can be used to clear mine fields, either by artillery bombardment, or with specialised charges such as Bangalore torpedoes, the Antipersonnel Obstacle Breaching System and the Python Minefield Breaching System. 156 states are parties to the Ottawa Treaty under which they have agreed not to use, produce or transfer anti-personnel mines. Anti-ship missiles are a modern method of stopping a potential adversary from attacking by sea.
China, North Korea and Iran all have developed or imported such weapons in an effort to develop a modern anti-access or A2/AD strategy to counter modern United States weaponry. In response to China’s pursuit of such A2/AD capabilities, the United States has developed the AirSea Battle doctrine. Amitai Etzioni of the Institute for Communitarian Policy Studies has suggested that AirSea Battle is an escalatory military posture that entails restructuring United States military forces and ordering additional weapons systems, that AirSea Battle could “lead to an arms race with China, which could culminate in a nuclear war.”Other methods of area denial at a strategic level include aircraft carriers, surface-to-air missiles, ballistic missiles, cruise missiles, electronic warfare and interceptor aircraft. Various CBRNE weapons can be used for area denial, as long. Fallout from nuclear weapons might be used in such a role. While never employed in this form, its use had been suggested by Douglas MacArthur during the Korean War.
Anthrax spores can contaminate the ground for long periods of time, thus providing a form of area denial. However, the short-term effects are to be low - the psychological effects on an opponent would be more significant; the massive use of defoliants such as Agent Orange can be used as an interdiction measure because they leave areas empty of any form of vegetation cover. In the desert-like terrain that ensues, it is impossible for the enemy to travel without being seen, there is little cover in case of an attack from the air. Many chemical weapons produce toxic effects on any personnel in an affected area. However, this has no tactical value, as the effects of indirect exposure do not develop fast or enough - though again, the psychological effect upon an enemy aware of the chemical usage may be considerable. There are however some chemical agents that are by design non-degrading, such as the nerve agent VX. Sulfur mustard was extensively used by both German and allied forces on the west front in World War I as an effective area-denial weapon through contaminating large land stripes by extensive shelling with HD/Gelbkreuz ordnance
Artillery is a class of heavy military weapons built to fire munitions far beyond the range and power of infantry's small arms. Early artillery development focused on the ability to breach defensive walls, fortifications during sieges, led to heavy immobile siege engines; as technology improved, more mobile field artillery cannons developed for battlefield use. This development continues today. In its earliest sense, the word artillery referred to any group of soldiers armed with some form of manufactured weapon or armour. Since the introduction of gunpowder and cannon, the word "artillery" has meant cannon, in contemporary usage, it refers to shell-firing guns, howitzers and rocket artillery. In common speech, the word artillery is used to refer to individual devices, along with their accessories and fittings, although these assemblages are more properly called "equipments". However, there is no recognised generic term for a gun, mortar, so forth: the United States uses "artillery piece", but most English-speaking armies use "gun" and "mortar".
The projectiles fired are either "shot" or "shell". "Shell" is a used generic term for a projectile, a component of munitions. By association, artillery may refer to the arm of service that customarily operates such engines. In some armies one arm has operated field, anti-aircraft artillery and anti-tank artillery, in others these have been separate arms and in some nations coastal has been a naval or marine responsibility. In the 20th century technology based target acquisition devices, such as radar, systems, such as sound ranging and flash spotting, emerged to acquire targets for artillery; these are operated by one or more of the artillery arms. The widespread adoption of indirect fire in the early 20th century introduced the need for specialist data for field artillery, notably survey and meteorological, in some armies provision of these are the responsibility of the artillery arm. Artillery originated for use against ground targets—against infantry and other artillery. An early specialist development was coastal artillery for use against enemy ships.
The early 20th century saw the development of a new class of artillery for use against aircraft: anti-aircraft guns. Artillery is arguably the most lethal form of land-based armament employed, has been since at least the early Industrial Revolution; the majority of combat deaths in the Napoleonic Wars, World War I, World War II were caused by artillery. In 1944, Joseph Stalin said in a speech that artillery was "the God of War". Although not called as such, machines performing the role recognizable as artillery have been employed in warfare since antiquity. Historical references show artillery was first employed by the Roman legions at Syracuse in 399 BC; until the introduction of gunpowder into western warfare, artillery was dependent upon mechanical energy which not only limited the kinetic energy of the projectiles, it required the construction of large engines to store sufficient energy. A 1st-century BC Roman catapult launching 6.55 kg stones achieved a kinetic energy of 16,000 joules, compared to a mid-19th-century 12-pounder gun, which fired a 4.1 kg round, with a kinetic energy of 240,000 joules, or a late 20th century US battleship that fired a 1,225 kg projectile from its main battery with an energy level surpassing 350,000,000 joules.
From the Middle Ages through most of the modern era, artillery pieces on land were moved by horse-drawn gun carriages. In the contemporary era, artillery pieces and their crew relied on wheeled or tracked vehicles as transportation; these land versions of artillery were dwarfed by railway guns, which includes the largest super-gun conceived, theoretically capable of putting a satellite into orbit. Artillery used by naval forces has changed with missiles replacing guns in surface warfare. Over the course of military history, projectiles were manufactured from a wide variety of materials, into a wide variety of shapes, using many different methods in which to target structural/defensive works and inflict enemy casualties; the engineering applications for ordnance delivery have changed over time, encompassing some of the most complex and advanced technologies in use today. In some armies, the weapon of artillery is the projectile, not the equipment; the process of delivering fire onto the target is called gunnery.
The actions involved in operating an artillery piece are collectively called "serving the gun" by the "detachment" or gun crew, constituting either direct or indirect artillery fire. The manner in which gunnery crews are employed is called artillery support. At different periods in history this may refer to weapons designed to be fired from ground-, sea-, air-based weapons platforms; the term "gunner" is used in some armed forces for the soldiers and sailors with the primary function of using artillery. The gunners and their guns are grouped in teams called either "crews" or "detachments". Several such crews and teams with other functions are combined into a unit of artillery called a battery, although sometimes called a company. In gun detachments, each role is numbered, starting with "1" the Detachment Commander, the highest number being the Coverer, the second-in-command. "Gunner" is the lowest rank and junior non-commissioned officers are "Bombardiers" in some artillery arms. Batteries are equivalent to a company in the infantry
A counter-insurgency or counterinsurgency is defined by the United States Department of State as "comprehensive civilian and military efforts taken to defeat and contain insurgency and address its root causes". An insurgency is a rebellion against a constituted authority when those taking part in the rebellion are not recognized as belligerents, it is "the organized use of subversion and violence to seize, nullify or challenge political control of a region. As such, it is a political struggle, in which both sides use armed force to create space for their political and influence activities to be effective." Counter-insurgency campaigns of duly-elected or politically recognized governments take place during war, occupation by a foreign military or police force, when internal conflicts that involve subversion and armed rebellion occur. The most effective counterinsurgency campaigns "integrate and synchronize political, security and informational components that reinforce governmental legitimacy and effectiveness while reducing insurgent influence over the population.
COIN strategies should be designed to protect the population from insurgent violence. According to scholars, it is crucial to know what this strategy was designed for to understand it comprehensively. COIN strategy aims to achieve the support of local population for the government created by host nation; the main point of the modern counterinsurgency campaign is not kill and capture insurgents, but to improve living conditions, support government in providing services for people and eliminate any support for insurgency. Counter-insurgency is conducted as a combination of conventional military operations and other means, such as demoralization in the form of propaganda, psy-ops, assassinations. Counter-insurgency operations include many different facets: military, political, economic and civic actions taken to defeat insurgency. To understand counter-insurgency, one must understand insurgency to comprehend the dynamics of revolutionary warfare. Insurgents capitalize on societal problems called gaps.
When the gaps are wide, they create a sea of discontent, creating the environment in which the insurgent can operate. In The Insurgent Archipelago John Mackinlay puts forward the concept of an evolution of insurgency from the Maoist paradigm of the golden age of insurgency to the global insurgency of the start of the 21st-century, he defines this distinction as'Maoist' and'post-Maoist' insurgency. William B. Caldwell wrote: The law of armed conflict requires that, to use force, "combatants" must distinguish individuals presenting a threat from innocent civilians; this basic principle is accepted by all disciplined militaries. In the counterinsurgency, disciplined application of force is more critical because our enemies camouflage themselves in the civilian population. Our success in Iraq depends on our ability to treat the civilian population with humanity and dignity as we remain ready to defend ourselves or Iraqi civilians when a threat is detected; the third Marques of Santa Cruz de Marcenado is the earliest author who dealt systematically in his writings with counter-insurgency.
In his Reflexiones Militares, published between 1726 and 1730, he discussed how to spot early signs of an incipient insurgency, prevent insurgencies, counter them, if they could not be warded off. Strikingly, Santa Cruz recognized that insurgencies are due to real grievances: "A state rises up without the fault of its governors." He advocated clemency towards the population and good governance, to seek the people's "heart and love". The majority of counter-insurgency efforts by major powers in the last century have been spectacularly unsuccessful; this may be attributed to a number of causes. First, as B. H. Liddell Hart pointed out in the Insurgency addendum to the second version of his book Strategy: The Indirect Approach, a popular insurgency has an inherent advantage over any occupying force, he showed as a prime example the French occupation of Spain during the Napoleonic wars. Whenever Spanish forces managed to constitute themselves into a regular fighting force, the superior French forces beat them every time.
However, once dispersed and decentralized, the irregular nature of the rebel campaigns proved a decisive counter to French superiority on the battlefield. Napoleon's army had no means of combatting the rebels, in the end their strength and morale were so sapped that when Wellington was able to challenge French forces in the field, the French had no choice but to abandon the situation. Counter-insurgency efforts may be successful when the insurgents are unpopular; the Philippine–American War, the Shining Path in Peru, the Malayan Emergency in Malaya have been the sites of failed insurgencies. Hart points to the experiences of T. E. Lawrence and the Arab Revolt during World War I as another example of the power of the rebel/insurgent. Though the Ottomans had advantages in manpower of more than 100 to 1, the Arabs' ability to materialize out of the desert and disappear again left the Turks reeling and paralyzed, creating an opportunity for regular British forces to sweep in and finish the Turkish forces off.
In both the preceding cases, the insurgents and rebel fighters were working in conjunction with or in a manner complementary to regular forces. Such was the case with the French Resistance during World War II and the National Liberation Front during the Vietna
A weapon, arm or armament is any device that can be used with intent to inflict damage or harm. Weapons are used to increase the efficacy and efficiency of activities such as hunting, law enforcement, self-defense, warfare. In broader context, weapons may be construed to include anything used to gain a tactical, material or mental advantage over an adversary or enemy target. While ordinary objects such as sticks, cars, or pencils can be used as weapons, many are expressly designed for the purpose – ranging from simple implements such as clubs and axes, to complicated modern intercontinental ballistic missiles, biological weapons and cyberweapons. Something, re-purposed, converted, or enhanced to become a weapon of war is termed weaponized, such as a weaponized virus or weaponized laser; the use of objects as weapons has been observed among chimpanzees, leading to speculation that early hominids used weapons as early as five million years ago. However, this can not be confirmed using physical evidence because wooden clubs and unshaped stones would have left an ambiguous record.
The earliest unambiguous weapons to be found are the Schöningen spears, eight wooden throwing spears dating back more than 300,000 years. At the site of Nataruk in Turkana, numerous human skeletons dating to 10,000 years ago may present evidence of traumatic injuries to the head, ribs and hands, including obsidian projectiles embedded in the bones that might have been caused from arrows and clubs during conflict between two hunter-gatherer groups, but the evidence interpretation of warfare at Nataruk has been challenged. The earliest ancient weapons were evolutionary improvements of late neolithic implements, but significant improvements in materials and crafting techniques led to a series of revolutions in military technology; the development of metal tools began with copper during the Copper Age and was followed by the Bronze Age, leading to the creation of the Bronze Age sword and similar weapons. During the Bronze Age, the first defensive structures and fortifications appeared as well, indicating an increased need for security.
Weapons designed to breach fortifications followed soon after, such as the battering ram, in use by 2500 BC. The development of iron-working around 1300 BC in Greece had an important impact on the development of ancient weapons, it was not the introduction of early Iron Age swords, however, as they were not superior to their bronze predecessors, but rather the domestication of the horse and widespread use of spoked wheels by c. 2000 BC. This led to the creation of the light, horse-drawn chariot, whose improved mobility proved important during this era. Spoke-wheeled chariot usage peaked around 1300 BC and declined, ceasing to be militarily relevant by the 4th century BC. Cavalry developed; the horse increased the speed of attacks. In addition to land based weaponry, such as the trireme, were in use by the 7th century BC. European warfare during the Post-classical history was dominated by elite groups of knights supported by massed infantry, they were involved in mobile combat and sieges which involved various siege tactics.
Knights on horseback developed tactics for charging with lances providing an impact on the enemy formations and drawing more practical weapons once they entered into the melee. By contrast, infantry, in the age before structured formations, relied on cheap, sturdy weapons such as spears and billhooks in close combat and bows from a distance; as armies became more professional, their equipment was standardized and infantry transitioned to pikes. Pikes are seven to eight feet in length, used in conjunction with smaller side-arms. In Eastern and Middle Eastern warfare, similar tactics were developed independent of European influences; the introduction of gunpowder from the Asia at the end of this period revolutionized warfare. Formations of musketeers, protected by pikemen came to dominate open battles, the cannon replaced the trebuchet as the dominant siege weapon; the European Renaissance marked the beginning of the implementation of firearms in western warfare. Guns and rockets were introduced to the battlefield.
Firearms are qualitatively different from earlier weapons because they release energy from combustible propellants such as gunpowder, rather than from a counter-weight or spring. This energy is released rapidly and can be replicated without much effort by the user; therefore early firearms such as the arquebus were much more powerful than human-powered weapons. Firearms became important and effective during the 16th century to 19th century, with progressive improvements in ignition mechanisms followed by revolutionary changes in ammunition handling and propellant. During the U. S. Civil War new applications of firearms including the machine gun and ironclad warship emerged that would still be recognizable and useful military weapons today in limited conflicts. In the 19th century warship propulsion changed from sail power to fossil fuel-powered steam engines. Since the mid-18th century North American French-Indian war through the beginning of the 20th century, human-powered weapons were reduced from the primary weaponry of the battlefield yielding to gunpowder-based weaponry.
Sometimes referred to as the "Age of Rifles", this period was characterized by the development of firearms for infantry and cannons for support, as well as the beginnings of mechanized weapons such as the machine gun. Of particular note, Howitzers were able to destroy masonry fortresses and other fortifications, this single invention caused a Revolution in
Biological warfare —also known as germ warfare—is the use of biological toxins or infectious agents such as bacteria and fungi with the intent to kill or incapacitate humans, animals or plants as an act of war. Biological weapons are living organisms or replicating entities that reproduce or replicate within their host victims. Entomological warfare is considered a type of biological weapon; this type of warfare is distinct from nuclear warfare and chemical warfare, which together with biological warfare make up NBC, the military initialism for nuclear and chemical warfare using weapons of mass destruction. None of these are considered conventional weapons, which are deployed for their explosive, kinetic, or incendiary potential. Biological weapons may be employed in various ways to gain a strategic or tactical advantage over the enemy, either by threats or by actual deployments. Like some chemical weapons, biological weapons may be useful as area denial weapons; these agents may be lethal or non-lethal, may be targeted against a single individual, a group of people, or an entire population.
They may be developed, stockpiled or deployed by nation states or by non-national groups. In the latter case, or if a nation-state uses it clandestinely, it may be considered bioterrorism. Biological warfare and chemical warfare overlap to an extent, as the use of toxins produced by some living organisms is considered under the provisions of both the Biological Weapons Convention and the Chemical Weapons Convention. Toxins and psychochemical weapons are referred to as midspectrum agents. Unlike bioweapons, these midspectrum agents do not reproduce in their host and are characterized by shorter incubation periods; the use of biological weapons is prohibited under customary international humanitarian law, as well as a variety of international treaties. The use of biological agents in armed conflict is a war crime. Offensive biological warfare, including mass production and use of biological weapons, was outlawed by the 1972 Biological Weapons Convention; the rationale behind this treaty, ratified or acceded to by 170 countries as of April 2013, is to prevent a biological attack which could conceivably result in large numbers of civilian casualties and cause severe disruption to economic and societal infrastructure.
Many countries, including signatories of the BWC pursue research into the defense or protection against BW, not prohibited by the BWC. A nation or group that can pose a credible threat omass casualty has the ability to alter the terms on which other nations or groups interact with it. Biological weapons allow for the potential to create a level of destruction and loss of life far in excess of nuclear, chemical or conventional weapons, relative to their mass and cost of development and storage. Therefore, biological agents may be useful as strategic deterrents in addition to their utility as offensive weapons on the battlefield; as a tactical weapon for military use, a significant problem with a BW attack is that it would take days to be effective, therefore might not stop an opposing force. Some biological agents (smallpox, have the capability of person-to-person transmission via aerosolized respiratory droplets; this feature can be undesirable, as the agent may be transmitted by this mechanism to unintended populations, including neutral or friendly forces.
While containment of BW is less of a concern for certain criminal or terrorist organizations, it remains a significant concern for the military and civilian populations of all nations. Rudimentary forms of biological warfare have been practiced since antiquity; the earliest documented incident of the intention to use biological weapons is recorded in Hittite texts of 1500–1200 BC, in which victims of tularemia were driven into enemy lands, causing an epidemic. Although the Assyrians knew of ergot, a parasitic fungus of rye which produces ergotism when ingested, there is no evidence that they poisoned enemy wells with the fungus, as has been claimed. In 1346, the bodies of Mongol warriors of the Golden Horde who had died of plague were thrown over the walls of the besieged Crimean city of Kaffa. Specialists disagree over whether this operation may have been responsible for the spread of the Black Death into Europe, Near East and North Africa, resulting in the killing of 25 million Europeans.
The British Army commanders approved the use of smallpox as a biological weapon in the French and Indian War to target Native Americans during the Siege of Fort Pitt in 1763. Correspondence between General Jeffrey Amherst and Colonel Henry Bouquet provides further evidence that the English army planned for the use of biological weapons to kill Native Americans, as detailed in Native American disease and epidemics. A smallpox outbreak was reported in the Ohio Valley and Great Lakes area through 1763 and 1764; the spread of smallpox weakened the French and Native American resistance to the British troops led by Bouquet. The smallpox outbreak was considered a direct result of two blankets and a scarf taken from a Small Pox Hospital gifted by William Trent and others English army representatives to leader Maumaultee and warrior Turtle Heart of the Delaware people during their visit to Ft Pitt. Amherst and Bouquet discussed other biological weapon deployments as a result. Apologists pose questions as to whether the outbreak was the result of the Fort Pitt incident or the virus was present among the Delaware people.
It is that the British Marines used smallpox in New S
Jungle warfare is a term used to cover the special techniques needed for military units to survive and fight in jungle terrain. It has been the topic of extensive study by military strategists, was an important part of the planning for both sides in many conflicts, including World War II and the Vietnam War; the jungle has a variety of effects on military operations. Dense vegetation can limit lines of sight and arcs of fire, but can provide ample opportunity for camouflage and plenty of material with which to build fortifications. Jungle terrain without good roads, can be inaccessible to vehicles and so makes supply and transport difficult, which in turn places a premium on air mobility; the problems of transport make engineering resources important as they are needed to improve roads, build bridges and airfields, improve water supplies. Jungle environments can be inherently unhealthy, with various tropical diseases that have to be prevented or treated by medical services; the terrain can make it difficult to deploy armoured forces, or any other kind of forces on any large scale.
Successful jungle fighting emphasises effective small unit tactics and leadership. Throughout world history, forests have played significant roles in many of the most historic battles. For example, in the Battle of the Teutoburg Forest between the Romans and the Germanic tribes in 9 CE, the Germans used the forest to ambush the Romans. In ancient China, the Chinese Empire planted forests on its strategic borderland to thwart nomadic attacks. For example, the Northern Song Dynasty constructed and maintained an extensive defensive forest in present-day Hebei. At the start of WW2 in the Far East, the Japanese Imperial Forces were able to advance on all fronts. In the Malayan Campaign and again they infiltrated through the jungle to bypass static British positions based on road blocks so that they could cut the British supply line and attack the British defences from all sides. In early 1942, the fighting in Burma at the start of the Burma Campaign took on a similar aspect and resulted in one of the longest retreats in British military history.
Most members of the British Indian Army left Burma with the belief that the Japanese were unstoppable in the jungle. The first action that began to dispel this myth of invincibility would come from the actions of the Chindits; the Chindits were a special force of 3,500 which in February 1942 launched a deep penetration raid, into Japanese occupied Burma. They went in on foot using mules to carry supplies; the operation was not a military success, but was a propaganda boost for the Allies, because it showed that Allied forces could move and fight in jungle terrain well away from roads. On the back of the propaganda success, Orde Wingate, the eccentric commander of the Chindits, was given the resources to increase his command to divisional size and the USAAF supplied the 1st Air Commando Group to support his operations; the availability of air transport revolutionized Wingate's operational choices. In February 1944 Operation Thursday was launched, air transport support supplied 1st Air to allow the Chindits to set up air supplied bases deep behind enemy lines from which aggressive combat patrols could be sent out to interdict Japanese supply lines and disrupt rear echelon forces.
This in turn forced the Japanese 18th Division to pull front-line troops from the battle against X Force, advancing through Northern Burma to protect the men building the Ledo Road. When the Japanese closed on a base and got within artillery range the base could be abandoned and set up in another remote location; the ability to sustain the bases that relied on air power in the coming decades would prove a template for many similar operations. After the first Chindits expedition, thanks to the training the regular forces were receiving and the example of the Chindits and new divisional tactics, the regular units of the Fourteenth Army started to get the measure of both the jungle and the enemy; when the Japanese launched their late 1943 Arakan offensive they infiltrated Allied lines to attack the 7th Indian Infantry Division from the rear, overrunning the divisional HQ. Unlike previous occasions on which this had happened, the Allied forces stood firm against the attack and supplies were dropped to them by parachute.
In the Battle of the Admin Box from 5 February to 23 February, the Japanese were unable to break through the defended perimeter of the box. The Japanese switched their attack to the central front but again the British fell back into defensive box of Imphal, the Kohima redoubt. In falling back to the defensive positions around Imphal the leading British formations found their retreat cut by Japanese forces, but unlike they took that attitude that if the Japanese where behind them they were just as cut off as the British; the situation maps of the fighting along the roads leading to Imphal resembled a slice of marble cake as both sides used the jungle to outflank each other. Another major change by the British was that use of air support both as an offensive weapon to replace artillery, as a logistical tool to transport men and equipment. For example, the 5th Indian Infantry Division was airlifted straight from the now quieter Arakan front up to the central front and were in action within days of arriving.
By the end of the campaigning season both Kohima and Imphal had been relieved and the Japanese were in full retreat. The lessons learnt in Burma of how to fight in the jungle and how to use air transport to move troops around would lay the foundations of how to conduct large scale jungle campaigns in future wars. After the fall of Malaya and Singapore in 1942, a few British officers, such as Freddie Spencer Chapman, eluded c
Medieval warfare is the European warfare of the Middle Ages. Technological and social developments had forced a dramatic transformation in the character of warfare from antiquity, changing military tactics and the role of cavalry and artillery. In terms of fortification, the Middle Ages saw the emergence of the castle in Europe, which spread to Western Asia. Publius Flavius Vegetius Renatus wrote De re militari in the late 4th century. Described by historian Walter Goffart as "the bible of warfare throughout the Middle Ages", De re militari was distributed through the Latin West. While Western Europe relied on a single text for the basis of its military knowledge, the Byzantine Empire in Southeastern Europe had a succession of military writers. Though Vegetius had no military experience and De re militari was derived from the works of Cato and Frontinus, his books were the standard for military discourse in Western Europe from their production until the 16th century. De re militari was divided into five books: who should be a soldier and the skills they needed to learn, the composition and structure of an army, field tactics, how to conduct and withstand sieges, the role of the navy.
According to Vegetius, infantry was the most important element of an army because it was cheap compared to cavalry and could be deployed on any terrain. One of the tenets he put forward was that a general should only engage in battle when he was sure of victory or had no other choice; as archaeologist Robert Liddiard explains, "Pitched battles in the eleventh and twelfth centuries, were rare."Although his work was reproduced, over 200 copies and extracts survive today, the extent to which Vegetius affected the actual practice of warfare as opposed to its concept is unclear because of his habit of stating the obvious. Historian Michael Clanchy noted "the medieval axiom that laymen are illiterate and its converse that clergy are literate", so it may be the case that few soldiers read Vegetius' work. While their Roman predecessors were well-educated and had been experienced in warfare, the European nobility of the early Medieval period were not renowned for their education, but from the 12th century, it became more common for them to read.
Some soldiers regarded the experience of warfare as more valuable than reading about it. While it is uncertain to what extent his work was read by the warrior class as opposed to the clergy, Vegetius remained prominent in the literature on warfare in the medieval period. In 1489, King Henry VII of England commissioned the translation of De re militari into English, "so every gentleman born to arms and all manner of men of war, soldiers and all others would know how they ought to behave in the feats of wars and battles". In Europe, breakdowns in centralized power led to the rise of a number of groups that turned to large-scale pillage as a source of income. Most notably the Vikings raided significantly; as these groups were small and needed to move building fortifications was a good way to provide refuge and protection for the people and the wealth in the region. These fortifications evolved over the course of the Middle Ages, the most important form being the castle, a structure which has become synonymous with the Medieval era in the popular eye.
The castle served as a protected place for the local elites. Inside a castle they were protected from bands of raiders and could send mounted warriors to drive the enemy from the area, or to disrupt the efforts of larger armies to supply themselves in the region by gaining local superiority over foraging parties that would be impossible against the whole enemy host. Fortifications were a important part of warfare because they provided safety to the lord, his family, his servants, they provided refuge from armies too large to face in open battle. The ability of the heavy cavalry to dominate a battle on an open field was useless against fortifications. Building siege engines was a time-consuming process, could be done without preparations before the campaign. Many sieges could take months, if not years, to demoralize the defenders sufficiently. Fortifications were an excellent means of ensuring that the elite could not be dislodged from their lands – as Count Baldwin of Hainaut commented in 1184 on seeing enemy troops ravage his lands from the safety of his castle, "they can't take the land with them".
In the Medieval period besieging armies used a wide variety of siege engines including: scaling ladders. Siege techniques included mining in which tunnels were dug under a section of the wall and rapidly collapsed to destabilize the wall's foundation. Another technique was to bore into the enemy walls, however this was not nearly as effective as other methods due to the thickness of castle walls. Advances in the prosecution of sieges encouraged the development of a variety of defensive counter-measures. In particular, Medieval fortifications became progressively stronger – for example, the advent of the concentric castle from the period of the Crusades – and more dangerous to attackers – witness the increasing use of machicolations, as well the preparation of hot or incendiary substances. Arrow slits, concealed doors for sallies, deep water wells were integral to resisting siege at this time. Designers of castles paid particular attention to defending entrances, protec