1.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
2.
Muslim conquest of the Levant
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During the Roman period, beginning after the fall of Jerusalem in the year 70, the entire region was renamed Palaestina, subdivided into Diocese I and II. The Romans also renamed an area of land including the Negev, Sinai, part of the area was ruled by the Arab vassal state of the Ghassanids symmachos. Thus, on the eve of the Muslim conquests the Romans were still in the process of rebuilding their authority in these territories, politically, the Syrian region consisted of two provinces, Syria proper stretched from Antioch and Aleppo in the north to the top of the Dead Sea. To the west and south of the Dead Sea lay the province of Palestine, Syria was mostly a Syriac and Hellenized land with some Jewish presence and with a partly Arab population, especially in its eastern and southern parts. The Ghassan Dynasty became one of the princely dynasties of the Empire, with the Ghassan king ruling over the Arabs in Jordan. The last of the Ghassan kings, who ruled at the time of the Muslim invasion, was Jabla bin Al Aiham, the Byzantine Emperor Heraclius, after re-capturing Syria from the Sassanians, set up new defense lines from Gaza to the south end of the Dead Sea. These lines were designed to protect communications from bandits, and the bulk of the Byzantine defenses were concentrated in Northern Syria facing the traditional foes. This defense line had as a drawback that it enabled the Muslims, the 7th century was a time of fast military changes in the Byzantine Empire. Muhammad died in June 632, and Abu Bakr was appointed Caliph, soon after Abu Bakrs succession, several Arab tribes revolted against him in the Ridda wars. The Campaign of the Apostasy was fought and completed during the year of the Hijri. The year 12 Hijri dawned, on 18 March 633, with Arabia united under the authority of the Caliph at Medina. After successful campaigns against the Sassanids and the ensuing conquest of Iraq Khalid established his stronghold in Iraq, while engaged with Sassanid forces, confrontation also ensued with the Byzantine Arab clients, the Ghassanids. Tribal contingents were recruited to the call from Medinah from all over the Arabian peninsula. The tradition of raising armies from tribal contingents remained in use until 636, Abu Bakr organised the army into four corps, each with its own commander and objective. Move on Elat route, then across Valley of Arabah, Yazid ibn Abu Sufyan, Objective Damascus. Move on Tabuk route after Yazid, Abu Ubaidah ibn al-Jarrah, Objective Emesa. Move on Tabuk route after Shurahbil, in case the corps had to concentrate for one major battle, Abu Ubaidah was appointed Commander-in-Chief of the entire army. In the first week of April 634, the Muslim forces began to move from their camps outside Medina, the first to leave was Yazids corps, followed by Shurahbil, Abu Ubaidah and Amr, each a days march from the other
3.
Anno Domini
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The terms anno Domini and before Christ are used to label or number years in the Julian and Gregorian calendars. The term anno Domini is Medieval Latin and means in the year of the Lord, There is no year zero in this scheme, so the year AD1 immediately follows the year 1 BC. This dating system was devised in 525 by Dionysius Exiguus of Scythia Minor, the Gregorian calendar is the most widely used calendar in the world today. Traditionally, English followed Latin usage by placing the AD abbreviation before the year number, however, BC is placed after the year number, which also preserves syntactic order. The abbreviation is widely used after the number of a century or millennium. Because BC is the English abbreviation for Before Christ, it is sometimes concluded that AD means After Death. However, this would mean that the approximate 33 years commonly associated with the life of Jesus would not be included in either of the BC, astronomical year numbering and ISO8601 avoid words or abbreviations related to Christianity, but use the same numbers for AD years. The Anno Domini dating system was devised in 525 by Dionysius Exiguus to enumerate the years in his Easter table. His system was to replace the Diocletian era that had used in an old Easter table because he did not wish to continue the memory of a tyrant who persecuted Christians. The last year of the old table, Diocletian 247, was followed by the first year of his table. Thus Dionysius implied that Jesus Incarnation occurred 525 years earlier, without stating the year during which his birth or conception occurred. Blackburn & Holford-Strevens briefly present arguments for 2 BC,1 BC, There were inaccuracies in the list of consuls There were confused summations of emperors regnal years It is not known how Dionysius established the year of Jesuss birth. It is convenient to initiate a calendar not from the day of an event. For example, the Islamic calendar begins not from the date of the Hegira, at the time, it was believed by some that the Resurrection and end of the world would occur 500 years after the birth of Jesus. The old Anno Mundi calendar theoretically commenced with the creation of the based on information in the Old Testament. It was believed that, based on the Anno Mundi calendar, Anno Mundi 6000 was thus equated with the resurrection and the end of the world but this date had already passed in the time of Dionysius. The Anglo-Saxon historian the Venerable Bede, who was familiar with the work of Dionysius Exiguus, used Anno Domini dating in his Ecclesiastical History of the English People, completed in 731. e. On the continent of Europe, Anno Domini was introduced as the era of choice of the Carolingian Renaissance by the English cleric and scholar Alcuin in the late eighth century
4.
Homs
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Homs, previously known as Emesa, is a city in western Syria and the capital of the Homs Governorate. It is 501 metres above sea level and is located 162 kilometres north of Damascus, located on the Orontes River, Homs is also the central link between the interior cities and the Mediterranean coast. Its population reflects Syrias general religious diversity, composed of Sunni and Alawite, there are a number of historic mosques and churches in the city, and it is close to the Krak des Chevaliers castle, a world heritage site. Homs did not emerge into the record until the 1st century BCE at the time of the Seleucids. It later became the capital of a kingdom ruled by the Emesani dynasty who gave the city its name, originally a center of worship for the sun god El-Gabal, it later gained importance in Christianity under the Byzantines. Homs was conquered by the Muslims in the 7th century and made capital of a district that bore its current name, throughout the Islamic era, Muslim dynasties contending for control of Syria sought after Homs due to the citys strategic position in the area. Homs began to decline under the Ottomans and only in the 19th century did the city regain its importance when its cotton industry boomed. During French Mandate rule, the city became a center of insurrection and, after independence in 1946, in the ongoing Syrian civil war, Homs became an opposition stronghold and the Syrian government launched a military assault against the city in May 2011. The following Siege of Homs left much of the city completely destroyed, the war in the city ended in 2015 when rebels evacuated the city, resulting in a government victory. The origin of the modern name is that it is an Arabic form of the citys Latin name Emesus. The name Emesa seems to derive from the nomadic Arab tribe, called Emesenoi by the Greeks and the Romans, Emesa was shortened to Homs or Hims by its Arab inhabitants, many of whom settled there prior to the Muslim conquest of Syria. This name has been preserved throughout the period of Islamic rule continuing to the present day and it was known as la Chamelle by the Crusaders, although they never ruled the city. For approximately 2,000 years, Homs has served as a key market, production site. It has also provided security services to the hinterland of Syria, excavations at the Citadel of Homs indicate that the earliest settlement at the site dates back to around 2300 BCE. Biblical scholars have identified the city with Zobah mentioned in the Bible, in 1274 BCE, a battle took place between the forces of the Egyptian Empire under Ramesses II and the Hittite Empire under Muwatalli II at the city of Kadesh on the Orontes River near Homs. It was possibly the largest chariot battle ever fought, involving perhaps 5, at this time, Greek philosopher Strabo spoke of a tent-dwelling tribe called the Emesani living in the area around the Orontes and south of the Apamea region. They were an Arab tribe in the area and settled in Emesa—which derived its name from them. Their chief at the time, Sampsiceramus I, gained the status as King of Emesa, but their capital was at Arethusa, a city north of Emesa, also along the Orontes River
5.
Syria
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Syrias capital and largest city is Damascus. Religious groups include Sunnis, Christians, Alawites, Druze, Mandeans, Shiites, Salafis, Sunni Arabs make up the largest religious group in Syria. Its capital Damascus and largest city Aleppo are among the oldest continuously inhabited cities in the world, in the Islamic era, Damascus was the seat of the Umayyad Caliphate and a provincial capital of the Mamluk Sultanate in Egypt. The post-independence period was tumultuous, and a number of military coups. In 1958, Syria entered a union with Egypt called the United Arab Republic. Syria was under Emergency Law from 1963 to 2011, effectively suspending most constitutional protections for citizens, Bashar al-Assad has been president since 2000 and was preceded by his father Hafez al-Assad, who was in office from 1970 to 2000. Mainstream modern academic opinion strongly favours the argument that the Greek word is related to the cognate Ἀσσυρία, Assyria, in the past, others believed that it was derived from Siryon, the name that the Sidonians gave to Mount Hermon. However, the discovery of the inscription in 2000 seems to support the theory that the term Syria derives from Assyria. The area designated by the word has changed over time, since approximately 10,000 BC, Syria was one of centers of Neolithic culture where agriculture and cattle breeding appeared for the first time in the world. The following Neolithic period is represented by houses of Mureybet culture. At the time of the pre-pottery Neolithic, people used vessels made of stone, gyps, finds of obsidian tools from Anatolia are evidences of early trade relations. Cities of Hamoukar and Emar played an important role during the late Neolithic, archaeologists have demonstrated that civilization in Syria was one of the most ancient on earth, perhaps preceded by only those of Mesopotamia. The earliest recorded indigenous civilisation in the region was the Kingdom of Ebla near present-day Idlib, gifts from Pharaohs, found during excavations, confirm Eblas contact with Egypt. One of the earliest written texts from Syria is an agreement between Vizier Ibrium of Ebla and an ambiguous kingdom called Abarsal c.2300 BC. The Northwest Semitic language of the Amorites is the earliest attested of the Canaanite languages, Mari reemerged during this period, and saw renewed prosperity until conquered by Hammurabi of Babylon. Ugarit also arose during this time, circa 1800 BC, close to modern Latakia, Ugaritic was a Semitic language loosely related to the Canaanite languages, and developed the Ugaritic alphabet. The Ugarites kingdom survived until its destruction at the hands of the marauding Indo-European Sea Peoples in the 12th century BC, Yamhad was described in the tablets of Mari as the mightiest state in the near east and as having more vassals than Hammurabi of Babylon. Yamhad imposed its authority over Alalakh, Qatna, the Hurrians states, the army of Yamhad campaigned as far away as Dēr on the border of Elam
6.
Rashidun Caliphate
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The Rashidun Caliphate was the Islamic caliphate in the earliest period of Islam, comprising the first five caliphs—the Rightly Guided or Rashidun caliphs. It was founded after Muhammads death in 632 CE, after Muhammads death in 632 CE, the Medinan Ansar debated which of them should succeed him in running the affairs of the Muslims while Muhammads household was busy with his burial. Umar and Abu Ubaidah ibn al-Jarrah pledged their loyalty to Abu Bakr, with the Ansar, Abu Bakr thus became the first Khalīfatu Rasūli l-Lāh successor of the Messenger of God, or caliph, and embarked on campaigns to propagate Islam. First he would have to subdue the Arabian tribes which had claimed that although they pledged allegiance to Muhammad and accepted Islam, as a caliph, Abu Bakr was not a monarch and never claimed such a title, nor did any of his three successors. Rather, their election and leadership were based upon merit, as for the fifth Caliph, ‘Alis son Al-Hasan, as a son of Fatimah, he was a grandson of Muhammad. Furthermore, according to other hadiths in Sunan Abu Dawood and Musnad Ahmad ibn Hanbal, towards the end times, Abu Bakr, the oldest companion of Muhammad, was caliph for only 2 years before he died. When Muhammad died, Abu Bakr and Umar, his two companions, were in the Saqifah meeting to select his successor while the family of Muhammad was busy with his funeral, controversy among the Muslims emerged about whom to name as Caliph. There was disagreement between the Meccan followers of Muhammad who had emigrated with him in 622 and the Medinans who had become followers, the Ansar, considering themselves being the hosts and loyal companions of Muhammad, nominated Sad bin Ubadah as their candidate for the Caliphate. In the end, however, Muhammads closest friend, Abu Bakr, was named the khalifa or Successor of Muhammad, a new circumstance had formed a new, untried political formation, the caliphate. Troubles emerged soon after Muhammads death, threatening the unity and stability of the new community, Apostasy spread to every tribe in the Arabian Peninsula with the exception of the people in Mecca and Medina, the Banu Thaqif in Taif and the Bani Abdul Qais of Oman. In some cases, entire tribes apostatised, others merely withheld zakat, the alms tax, without formally challenging Islam. Many tribal leaders made claims to prophethood, some made it during the lifetime of Muhammad, the news of his death reached Medina shortly after the death of Muhammad. The apostasy of al-Yamama was led by another supposed prophet, Musaylimah, many tribes claimed that they had submitted to Muhammad and that with Muhammads death, their allegiance was ended. Caliph Abu Bakr insisted that they had not just submitted to a leader, the result of this situation was the Ridda wars. Abu Bakr planned his strategy accordingly and he divided the Muslim army into several corps. The strongest corps, and the force of the Muslims, was the corps of Khalid ibn al-Walid. This corps was used to fight the most powerful of the rebel forces, other corps were given areas of secondary importance in which to bring the less dangerous apostate tribes to submission. After a series of successful campaigns Khalid ibn Walid defeated Musaylimah in the Battle of Yamama, the Campaign on the Apostasy was fought and completed during the eleventh year of the Hijri
7.
Byzantine Empire
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It survived the fragmentation and fall of the Western Roman Empire in the 5th century AD and continued to exist for an additional thousand years until it fell to the Ottoman Turks in 1453. During most of its existence, the empire was the most powerful economic, cultural, several signal events from the 4th to 6th centuries mark the period of transition during which the Roman Empires Greek East and Latin West divided. Constantine I reorganised the empire, made Constantinople the new capital, under Theodosius I, Christianity became the Empires official state religion and other religious practices were proscribed. Finally, under the reign of Heraclius, the Empires military, the borders of the Empire evolved significantly over its existence, as it went through several cycles of decline and recovery. During the reign of Maurice, the Empires eastern frontier was expanded, in a matter of years the Empire lost its richest provinces, Egypt and Syria, to the Arabs. This battle opened the way for the Turks to settle in Anatolia, the Empire recovered again during the Komnenian restoration, such that by the 12th century Constantinople was the largest and wealthiest European city. Despite the eventual recovery of Constantinople in 1261, the Byzantine Empire remained only one of several small states in the area for the final two centuries of its existence. Its remaining territories were annexed by the Ottomans over the 15th century. The Fall of Constantinople to the Ottoman Empire in 1453 finally ended the Byzantine Empire, the term comes from Byzantium, the name of the city of Constantinople before it became Constantines capital. This older name of the city would rarely be used from this point onward except in historical or poetic contexts. The publication in 1648 of the Byzantine du Louvre, and in 1680 of Du Canges Historia Byzantina further popularised the use of Byzantine among French authors, however, it was not until the mid-19th century that the term came into general use in the Western world. The Byzantine Empire was known to its inhabitants as the Roman Empire, the Empire of the Romans, Romania, the Roman Republic, Graikia, and also as Rhōmais. The inhabitants called themselves Romaioi and Graikoi, and even as late as the 19th century Greeks typically referred to modern Greek as Romaika and Graikika. The authority of the Byzantine emperor as the legitimate Roman emperor was challenged by the coronation of Charlemagne as Imperator Augustus by Pope Leo III in the year 800. No such distinction existed in the Islamic and Slavic worlds, where the Empire was more seen as the continuation of the Roman Empire. In the Islamic world, the Roman Empire was known primarily as Rûm, the Roman army succeeded in conquering many territories covering the entire Mediterranean region and coastal regions in southwestern Europe and north Africa. These territories were home to different cultural groups, both urban populations and rural populations. The West also suffered heavily from the instability of the 3rd century AD
8.
Abu Ubaidah ibn al-Jarrah
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Abu Ubaidah ibn al-Jarrah, fully Abū ‘Ubaydah ‘Āmir ibn ‘Abdillāh ibn al-Jarāḥ, was one of companions of the Islamic prophet Muhammad. He remained commander of a section of the Rashidun Army during the time of the Rashid Caliph Umar and was on the list of Umars appointed successors to the Caliphate. Abu Ubaidah was born in the year 583 CE in the house of Abdullah ibn al-Jarrah, Abu Ubaidah belonged to the Qurayshi clan of Banu al-Harith ibn Fihr. Even before his conversion to Islam, he was considered to be one of the nobles of the Quraysh and was famous among the Quraysh of Mecca for his modesty, by 611, Muhammad was preaching the oneness of God to the people of Mecca. He began by inviting his closest companions and relatives in private to the way of Islam and he embraced Islam just a day after Abu Bakr in the year 611. Abu Ubaidah lived through the experience that the Muslims went through in Mecca from beginning to end. With other early Muslims, he endured the insults and oppressions of the Quraysh, as the first migration to Abyssinia succeeded, this violence against the Muslims renewed itself with much conviction and became stronger in its force. Being the only person in his clan to have accepted Islam, Muhammad suggested that the remaining Muslims who were especially subject to the atrocities of the people of Mecca migrate as well. Consequently, Abu Ubaidah migrated to Abyssinia along with a delegation of 83 men and 19 women, in 622 CE, when Muhammad migrated from Mecca to Medina, Abu Ubaidah also migrated. When Muhammad arrived in Medina, he paired off each immigrant with one of the residents of Medina, the Muslims remained in peace in Medina for about a year before the Quraysh raised an army to attack Medina. In the year 624, Abu Ubaidah participated in the first major battle between the Muslims and the Quraysh of Mecca, at the Battle of Badr, in this battle, he was attacked by his father Abdullah ibn al-Jarrah, who was fighting alongside the army of Quraysh. Abu Ubaidah avoided fighting with him but eventually his father succeeded in blocking Abu Ubaidahs path, Abu Ubaidah then attacked him and killed him. For such He has written Faith in their hearts, and strengthened them with a spirit from Himself, and He will admit them to Gardens beneath which Rivers flow, to dwell therein. Allah will be pleased with them, and they with Him. They are the Party of Allah, truly it is the Party of Allah that will achieve Felicity. In the year 625, he participated in the Battle of Uhud, Abu Ubaidah was one of them and he guarded Muhammad from the attacks of the Qurayshi soldiers. On that day, Abu Ubaidah lost two of his front teeth while trying to extract two links of Muhammads armour that had penetrated into his cheeks, later in the year 627 he took part in the Battle of the Trench and also in the Invasion of Banu Qurayza. He was also commander of a small expedition that set out to attack and destroy the tribes of Thalibah and Anmar
9.
Khalid ibn al-Walid
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Abū Sulaymān Khālid ibn al-Walīd ibn al-Mughīrah al-Makhzūmī, also known as Sayf Allāh al-Maslūl, was a companion of Muhammad. He is noted for his tactics and prowess, commanding the forces of Medina under Muhammad. It was under his leadership that Arabia, for the first time in history, was united under a single political entity. His strategic achievements include the conquest of Arabia during the Ridda Wars, Persian Mesopotamia and he is also remembered for his decisive victories at Yamamah, Ullais, and Firaz, and his tactical successes at Walaja and Yarmouk. Khalid ibn al-Walid was from the Meccan tribe of Quraysh, from a clan that initially opposed Muhammad and he played a vital role in the Meccan victory at the Battle of Uhud against the Muslims. Khalid ibn Al-Walid reported that the fighting was so intense, that while fighting and this earned him the title ‘Saif-ullah meaning The Sword Of Allah. Khalid took over after Zayd ibn Haritha, then Jafar ibn Abi Talib, after Muhammads death, he played a key role in commanding Medinan forces for Abu Bakr in the Ridda wars, conquering central Arabia and subduing Arab tribes. He captured the Sassanid Arab client Kingdom of Al-Hirah, and defeated the Sassanid Persian forces during his conquest of Iraq and he was later transferred to the western front to capture Roman Syria and the Byzantine Arab client state of the Ghassanids. Although Umar later relieved him of command, he nevertheless remained the effective leader of the forces arrayed against the Byzantines during the early stages of the Byzantine–Arab Wars. Under his command, Damascus was captured in 634 and the key Arab victory against the Byzantine forces was achieved at the Battle of Yarmouk, in 638, at the zenith of his career, he was dismissed from military services. Khalid is said to have fought around a hundred battles, both battles and minor skirmishes as well as single duels, during his military career. Having remained undefeated, he is claimed by some to be one of the finest military generals in history, Khalid was born c.592 in Mecca. His father was Walid ibn al-Mughirah, Sheikh of the Banu Makhzum, Walid was known in Mecca by the title of al-Waheed - the Loner. Khalids mother was Lubabah al-Sughra bint al-Harith, a sister of Maymunah bint al-Harith. At the age of five or six, he returned to his parents in Mecca, during his childhood Khalid suffered a mild attack of smallpox, which he survived, but it left some pockmarks on his left cheek. The three leading clans of Quraysh at that time were Banu Hashim, Banu Abd ad-Dar and Banu Makhzum, the latter clan being responsible for the matters of warfare. As a member of the Makhzum clan, who were amongst the best horsemen in Arabia, Khalid learned to ride and use weapons as the spear, the lance, the bow. The lance was said to be his favorite among the weapons, in youth he was admired as a renowned warrior and wrestler among the Quraysh
Rashidun Caliphate
Byzantine empire