Oerlikon 20 mm cannon
The Oerlikon 20 mm cannon is a series of autocannons, based on an original German 20 mm Becker design that appeared early in World War I. It was produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II, many versions still in use today. During World War I, the German industrialist Reinhold Becker developed a 20 mm caliber cannon, known now as the 20 mm Becker using the Advanced Primer Ignition blowback method of operation; this had a cyclic rate of fire of 300 rpm. It was used on a limited scale as an aircraft gun on Luftstreitkräfte warplanes, an anti-aircraft gun towards the end of that war; because the Treaty of Versailles banned further production of such weapons in Germany, the patents and design works were transferred in 1919 to the Swiss firm SEMAG based near Zürich. SEMAG continued development of the weapon, in 1924 had produced the SEMAG L, a heavier weapon that fired more powerful 20x100RB ammunition at a higher rate of fire, 350 rpm.
In 1924 SEMAG failed. The Oerlikon firm, named after the Zürich suburb of Oerlikon where it was based acquired all rights to the weapon, plus the manufacturing equipment and the employees of SEMAG. In 1927 the Oerlikon S was added to the existing product line; this fired a still larger cartridge to achieve a muzzle velocity of 830 m/s, at the cost of increased weight and a reduced rate of fire. The purpose of this development was to improve the performance of the gun as an anti-tank and anti-aircraft weapon, which required a higher muzzle velocity. An improved version known as the 1S followed in 1930. Three sizes of gun with their different ammunition and barrel length, but similar mechanisms, continued to be developed in parallel. In 1930 Oerlikon reconsidered the application of its gun in aircraft and introduced the AF and AL, designed to be used in flexible mounts, i.e. manually aimed by a gunner. The 15-round box magazine used by earlier versions of the gun was replaced by drum magazine holding 15 or 30 rounds.
In 1935 it made an important step by introducing a series of guns designed to be mounted in or on the wings of fighter aircraft. Designated with FF for Flügelfest meaning "wing-mounted", these weapons were again available in the three sizes, with designations FF, FFL and FFS; the FF fired a larger cartridge than the AF, 20x72RB, but the major improvement in these weapons was a significant increase in rate of fire. The FF weighed 24 kg and achieved a muzzle velocity of 550 to 600 m/s with a rate of fire of 520 rpm; the FFL of 30 kg fired a projectile at a muzzle velocity of 675 m/s with a rate of fire of 500 rpm. And the FFS, which weighed 39 kg, delivered a high muzzle velocity of 830 m/s at a rate of fire of 470 rpm. Apart from changes to the design of the guns for wing-mounting and remote control, larger drums were introduced as it would not be possible to exchange magazines in flight. For the FF series drum sizes of 45, 60, 75 and 100 rounds were available, but most users chose the 60-round drum.
The 1930s were a period of global re-armament, a number of foreign firms took licenses for the Oerlikon family of aircraft cannon. In France, Hispano-Suiza manufactured development of the FFS as the Hispano-Suiza HS.7 and Hispano-Suiza HS.9, for installation between the cylinder banks of its V-12 engines. In Germany, Ikaria further developed the FF gun as firing 20x80RB ammunition, and the Imperial Japanese Navy, after evaluating all three guns, ordered developments of the FF and FFL as the Type 99-1 and Type 99-2. The incorporation of the improvements of the FFS in a new anti-aircraft gun produced, in 1938, the Oerlikon SS. Oerlikon realized further improvements in rate of fire on the 1SS of 1942, the 2SS of 1945 which achieved 650 rpm. However, it was the original SS gun, adopted as anti-aircraft gun, being widely used by Allied navies during World War II; this gun used a 400-grain charge of IMR 4831 smokeless powder to propel a 2,000-grain projectile at 2,800 feet per second. The Oerlikon FF was installed as armament on some fighters of the 1930s, such as the Polish PZL P.24G.
Locally produced derivatives of the Oerlikon cannon were used much more extensively, on aircraft, on ships and on land. In the air, the Ikaria MG FF was used as armament on a number of German aircraft, of which the most famous is the Messerschmitt Bf 109; the Japanese Navy used their copy of the FF, designated the Type 99 Mark One cannon on a number of types including the Mitsubishi A6M Zero. In the war, they equipped fighters including the Zero with the Type 99 Mark Two, a version of the more powerful and faster-firing Oerlikon FFL; the French firm of Hispano-Suiza was a manufacturer of aircraft engines, it marketed the moteur-canon combination of its 12X and 12Y engines with a H. S.7 or H. S.9 cannon installed between the cylinder banks. The gun fired through the hollow propeller hub, this being elevated above the crankcase by the design of the gearing; such armament was installed on the Morane-Saulnier M. S.406 and some other types. Similar German installations of the MG FF were not successful.
The Oerlikon became best known in its naval applications. The Oerlikon was not looked upon favorably by the Royal Navy as a short-range anti-aircraft gun. All through 1937-1938 Lord Louis Mountbatten a Captain in the Royal Navy, waged a lone campaign within the Royal Navy to set up an unprejudiced trial for the Oerlikon 20 mm gun, but it was all in vain, it was not until the Commander-in-Chief of the Home Fleet, Admiral Sir Roger Backhouse, was appointed First Sea Lord tha
San Francisco the City and County of San Francisco, is the cultural and financial center of Northern California. San Francisco is the 13th-most populous city in the United States, the fourth-most populous in California, with 884,363 residents as of 2017, it covers an area of about 46.89 square miles at the north end of the San Francisco Peninsula in the San Francisco Bay Area, making it the second-most densely populated large US city, the fifth-most densely populated U. S. county, behind only four of the five New York City boroughs. San Francisco is part of the fifth-most populous primary statistical area in the United States, the San Jose–San Francisco–Oakland, CA Combined Statistical Area; as of 2017, it was the seventh-highest income county in the United States, with a per capita personal income of $119,868. As of 2015, San Francisco proper had a GDP of $154.2 billion, a GDP per capita of $177,968. The San Francisco CSA was the country's third-largest urban economy as of 2017, with a GDP of $907 billion.
Of the 500+ primary statistical areas in the US, the San Francisco CSA had among the highest GDP per capita in 2017, at $93,938. San Francisco was ranked 14th in the world and third in the United States on the Global Financial Centres Index as of September 2018. San Francisco was founded on June 29, 1776, when colonists from Spain established Presidio of San Francisco at the Golden Gate and Mission San Francisco de Asís a few miles away, all named for St. Francis of Assisi; the California Gold Rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time. San Francisco became a consolidated city-county in 1856. San Francisco's status as the West Coast's largest city peaked between 1870 and 1900, when around 25% of California's population resided in the city proper. After three-quarters of the city was destroyed by the 1906 earthquake and fire, San Francisco was rebuilt, hosting the Panama-Pacific International Exposition nine years later. In World War II, San Francisco was a major port of embarkation for service members shipping out to the Pacific Theater.
It became the birthplace of the United Nations in 1945. After the war, the confluence of returning servicemen, significant immigration, liberalizing attitudes, along with the rise of the "hippie" counterculture, the Sexual Revolution, the Peace Movement growing from opposition to United States involvement in the Vietnam War, other factors led to the Summer of Love and the gay rights movement, cementing San Francisco as a center of liberal activism in the United States. Politically, the city votes along liberal Democratic Party lines. A popular tourist destination, San Francisco is known for its cool summers, steep rolling hills, eclectic mix of architecture, landmarks, including the Golden Gate Bridge, cable cars, the former Alcatraz Federal Penitentiary, Fisherman's Wharf, its Chinatown district. San Francisco is the headquarters of five major banking institutions and various other companies such as Levi Strauss & Co. Gap Inc. Fitbit, Salesforce.com, Reddit, Inc. Dolby, Weebly, Pacific Gas and Electric Company, Pinterest, Uber, Mozilla, Wikimedia Foundation and Weather Underground.
It is home to a number of educational and cultural institutions, such as the University of San Francisco, University of California, San Francisco, San Francisco State University, the De Young Museum, the San Francisco Museum of Modern Art, the California Academy of Sciences. As of 2019, San Francisco is the highest rated American city on world liveability rankings; the earliest archaeological evidence of human habitation of the territory of the city of San Francisco dates to 3000 BC. The Yelamu group of the Ohlone people resided in a few small villages when an overland Spanish exploration party, led by Don Gaspar de Portolà, arrived on November 2, 1769, the first documented European visit to San Francisco Bay. Seven years on March 28, 1776, the Spanish established the Presidio of San Francisco, followed by a mission, Mission San Francisco de Asís, established by the Spanish explorer Juan Bautista de Anza. Upon independence from Spain in 1821, the area became part of Mexico. Under Mexican rule, the mission system ended, its lands became privatized.
In 1835, Englishman William Richardson erected the first independent homestead, near a boat anchorage around what is today Portsmouth Square. Together with Alcalde Francisco de Haro, he laid out a street plan for the expanded settlement, the town, named Yerba Buena, began to attract American settlers. Commodore John D. Sloat claimed California for the United States on July 7, 1846, during the Mexican–American War, Captain John B. Montgomery arrived to claim Yerba Buena two days later. Yerba Buena was renamed San Francisco on January 30 of the next year, Mexico ceded the territory to the United States at the end of the war. Despite its attractive location as a port and naval base, San Francisco was still a small settlement with inhospitable geography; the California Gold Rush brought a flood of treasure seekers. With their sourdough bread in tow, prospectors accumulated in San Francisco over rival Benicia, raising the population from 1,000 in 1848 to 25,000 by December 1849; the promise of great wealth was so strong that crews on arriving vessels deserted and rushed off to the gold fields, leaving behind a forest of masts in San Francisco harbor.
Some of these 500 abandoned ships were used at times as storeships and hotels.
A depth charge is an anti-submarine warfare weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge at a specific depth. Depth charges can be dropped by ships, patrol aircraft, helicopters. Depth charges were developed during World War I, were one of the first effective methods of attacking a submarine underwater, they were used in World War I and World War II. They remained part of the anti-submarine arsenals of many navies during the Cold War. Depth charges have now been replaced by anti-submarine homing torpedoes. A depth charge fitted with a nuclear warhead is known as a "nuclear depth bomb"; these were designed to be dropped from a patrol plane or deployed by an anti-submarine missile from a surface ship, or another submarine, located a safe distance away. All nuclear anti-submarine weapons were withdrawn from service by the United States, the United Kingdom, France and China in or around 1990.
They were replaced by conventional weapons whose accuracy and range had improved as ASW technology improved. The first attempt to fire charges against submerged targets was with aircraft bombs attached to lanyards which triggered them. A similar idea was a 16 lb guncotton charge in a lanyarded can. Two of these lashed together became known as the "depth charge Type A". Problems with the lanyards tangling and failing to function led to the development of a chemical pellet trigger as the "Type B"; these were effective at a distance of around 20 ft. A 1913 Royal Navy Torpedo School report described a device intended for countermining, a "dropping mine". At Admiral John Jellicoe's request, the standard Mark II mine was fitted with a hydrostatic pistol preset for 45 ft firing, to be launched from a stern platform. Weighing 1,150 lb, effective at 100 ft, the "cruiser mine" was a potential hazard to the dropping ship; the design work was carried out by Herbert Taylor at the RN Torpedo and Mine School, HMS Vernon.
The first effective depth charge, the Type D, became available in January 1916. It was a barrel-like casing containing a high explosive. There were two sizes—Type D, with a 300 lb charge for fast ships, Type D* with a 120 lb charge for ships too slow to leave the danger area before the more powerful charge detonated. A hydrostatic pistol actuated by water pressure at a pre-selected depth detonated the charge. Initial depth settings were 40 or 80 ft; because production could not keep up with demand, anti-submarine vessels carried only two depth charges, to be released from a chute at the stern of the ship. The first success was the sinking of U-68 off Kerry, Ireland, on 22 March 1916, by the Q-ship Farnborough. Germany became aware of the depth charge following unsuccessful attacks on U-67 on 15 April 1916, U-69 on 20 April 1916; the only other submarines sunk by depth charge during 1916 were UC-19 and UB-29. Numbers of depth charges carried per ship increased to four in June 1917, to six in August, 30-50 by 1918.
The weight of charges and racks caused ship instability unless heavy guns and torpedo tubes were removed to compensate. Improved pistols allowed greater depth settings in 50-foot increments, from 50 to 200 ft. Slower ships could safely use the Type D at below 100 ft and at 10 kn or more, so the ineffective Type D* was withdrawn. Monthly use of depth charges increased from 100 to 300 per month during 1917 to an average of 1745 per month during the last six months of World War I; the Type D could be detonated as deep as 300 ft by that date. By the war's end, 74,441 depth charges had been issued by the RN, 16,451 fired, scoring 38 kills in all, aiding in 140 more; the United States requested full working drawings of the device in March 1917. Having received them, Commander Fullinwider of the U. S. Bureau of Naval Ordnance and U. S. Navy engineer Minkler made some modifications and patented it in the U. S, it has been argued. The Royal Navy Type D depth charge was designated the "Mark VII" in 1939. Initial sinking speed was 7 ft/s with a terminal velocity of 9.9 ft/s at a depth of 250 ft if rolled off the stern, or upon water contact from a depth charge thrower.
Cast iron weights of 150 lb were attached to the Mark VII at the end of 1940 to increase sinking velocity to 16.8 ft/s. New hydrostatic pistols increased the maximum detonation depth to 900 ft; the Mark VII's 290 lb amatol charge was estimated to be capable of splitting a 7⁄8 inch submarine pressure hull at a distance of 20 ft, forcing the submarine to surface at twice that. The change of explosive to Torpex at the end of 1942 was estimated to increase those distances to 26 and 52 ft; the British Mark X depth charge weighed 3,000 pounds and was launched from 21-inch torpedo tubes of older destroyers to achieve a sinking velocity of 21 ft/s. The launching ship needed to clear the area at 11 knots to avoid damage, the charge was used. Only 32 were fired, they were known to be troublesome; the teardrop-shaped United States Mark 9 depth charge entered service in the spring of 1943. The charge was 200 lb of Torpex with a sinking speed of 14.4 ft/s and depth settings of up to 600 ft. Versions increased depth to 1,000 ft and sinking
Adak Island is an island near the western extent of the Andreanof Islands group of the Aleutian Islands in Alaska. Alaska's southernmost town, Adak, is located on the island; the island has a land area of 274.59 square miles, measuring 33.9 miles on length and 22 miles on width, making it the 25th largest island in the United States. Due to harsh winds, frequent cloud cover, cold temperatures, vegetation is tundra at lower elevations; the highest point is Mt. Moffett, near the northwest end of the island, at an elevation of 3,924 feet, it is snow covered the greater part of the year. Adak, Alaska, is principal city; the word Adak is from the Aleut word adaq, which means "father". Adak Island has been the home to Aleut peoples since ancient times. Russian explorers in the 18th century visited the island but made no permanent settlements. During World War II, the Imperial Japanese Army took control of two of the westernmost Aleutian Islands - Attu and Kiska; the Japanese attacked the American base at Dutch Harbor by air.
The Japanese campaign coincided with the more well-known Battle of Midway. In response, the United States military began a campaign to oust the invaders. Since the nearest U. S. military presence was in Cold Bay, the U. S. began to construct bases in the western Aleutian Islands from which to launch operations against the Japanese. Adak Island was chosen as the site of an airfield, flight operations began in September 1942. On May 11, 1943, four days after the initial invasion date was delayed by bad weather, American soldiers landed on Attu Island and defeated the Japanese garrison there, at the cost of 2,300 Japanese and 550 American lives. Expecting a similar battle for Kiska Island, U. S. soldiers landing there August 15, 1943, found the occupiers had been stealthily evacuated by Japanese naval forces since the end of May, 1943. So, over 313 American soldiers died from friendly fire and other anti-personnel devices during U. S. operations to recover Kiska into U. S. territory. In 1953, remains of 236 Japanese dead, buried in Adak Cemetery were reburied in Japan's Chidorigafuchi National Cemetery.
After the war was over, the 6,000 American military men who served on Adak during World War II recalled Adak's cold, windy weather. Fresh food was a rarity. Adak Naval Air Station continued to be a military base during the Cold War but was designated a Base Realignment and Closure site in 1995 and closed in March 1997. Shortly thereafter, the town of Adak was incorporated at the site of the former base. Down from a peak population of 6,000, the island recorded a 2010 census population of 326 residents, all in the city of Adak, in the northern part of the island. In 1980, the Aleutian Islands National Wildlife Refuge was created and much of Adak Island lies within its boundaries; the Alaska Department of Fish and Game introduced 200 caribou to the island to help prevent emergency famine. The now large caribou herd is a popular hunting destination. Adak has a subpolar oceanic climate, characterized by persistently overcast skies, moderated temperatures, high winds, frequent cyclonic storms. At Adak, overcast conditions average nearly 75% of the time during June and July, dropping back to 50% of the time from October through February.
Adak averages 173 days per year with fog. The foggiest months are August when an average of 26 of the 31 days have fog; this number drops toward the winter season where the months of December through March have, on average, fewer than ten days with fog during any one month. Gales occur in all months of the year at Adak with the greatest chance from December through March. A peak gust of 109 knots occurred at Adak in March 1954. Adak's average temperatures range from 20 to 60 degrees Fahrenheit, with a record high of 75 °F and a record low of 3 °F. Average annual precipitation is about 54.8 inches. October to January are the wettest months due to frequent and intense mid-latitude cyclonic storms, while May to July represent markedly drier months. November is the average wettest month. Average snowfall is 100 inches, falling on the upper reaches of the volcanoes. Adak has an average of 341 days per year with measurable precipitation. Adak is served by the Aleutian Region Schools; the Adak School has around 20 students.
A land exchange between Aleut Corp. the U. S. Navy, the Department of the Interior has transferred most of the naval facilities to the Aleut Corp. A portion of the Island will remain within the National Maritime National Wildlife Refuge, managed by U. S. Fish & Wildlife. Adak provides a fueling port and crew transfer facility for foreign fishing fleets—an airport, housing facilities and food services are available. A grocery and ship supply store and restaurant opened in February 1999. Aleut Corporation maintains the facilities. Contractors are performing an environmental clean-up. Alaskan-owned Norquest-Adak Seafood Co. processes Pacific cod, mackerel, halibut and brown king crab. Four residents hold a commercial fishing permit for groundfish; the January 2006 National Geographic magazine presented pictures of the Sea-based X-band Radar in tow around Cape Horn to Adak for the purpose of anti-ballistic missile space surveillance. This operation required about one hundred technicians. Google Earth p
Sea of Okhotsk
The Sea of Okhotsk is a marginal sea of the western Pacific Ocean, between the Kamchatka Peninsula on the east, the Kuril Islands on the southeast, the island of Hokkaido to the south, the island of Sakhalin along the west, a long stretch of eastern Siberian coast along the west and north. The northeast corner is the Shelikhov Gulf; the sea is named after the first Russian settlement in the Far East. The Sea of Okhotsk covers an area of 1,583,000 square kilometres, with a mean depth of 859 metres and a maximum depth of 3,372 metres, it is connected to the Sea of Japan on either side of Sakhalin: on the west through the Sakhalin Gulf and the Gulf of Tartary. In winter, navigation on much of the Sea of Okhotsk becomes difficult or impossible due to the formation of large ice floes; this is due to the large amount of freshwater from the Amur River, lowering the salinity of upper levels raising the freezing point of the sea surface. The distribution and thickness of ice floes depends on many factors: the location, the time of year, water currents, the sea temperatures.
With the exception of Hokkaido, one of the Japanese home islands, the sea is surrounded on all sides by territory administered by the Russian Federation. The International Hydrographic Organization defines the limits of the Sea of Okhotsk as follows: On the Southwest; the Northeastern and Northern limits on the Japan Sea. On the Southeast. A line running from Nosyappu Saki in the Island of Hokusyû through the Kuril or Tisima Islands to Cape Lopatka in such a way that all the narrow waters between Hokusyû and Kamchatka are included in the Sea of Okhotsk; some of the Sea of Okhotsk's islands are quite large, including Japan's second largest island, Hokkaido, as well as Russia's largest island, Sakhalin. All of the sea's islands are either in coastal waters or belong to the various islands making up the Kuril Islands chain; these fall either under undisputed Japanese or Russian ownership or disputed ownership between Japan and Russia. Iony Island is the only island located in open waters and belongs to the Khabarovsk Krai of the Russian Federation.
The majority of the sea's islands are uninhabited making them ideal breeding grounds for seals, sea lions and other sea island fauna. Large colonies, with over a million individuals, of crested auklets use the Sea of Okhotsk as a nesting site; the Okhotsk culture is an archaeological coastal fishing and hunter-gatherer culture of the lands surrounding the Sea of Okhotsk. Some believe. Russian explorers Ivan Moskvitin and Vassili Poyarkov were the first Europeans to visit the Sea of Okhotsk in the 1640s; the Dutch captain Maarten Gerritsz Vries in the Breskens entered the Sea of Okhotsk from the south-east in 1643, charted parts of the Sakhalin coast and Kurile Islands, but failed to realize that either Sakhalin or Hokkaido are islands. The first and foremost Russian settlement on the shore was the port of Okhotsk, which relinquished commercial supremacy to Ayan in the 1840s; the Russian-American Company all but monopolized the commercial navigation of the sea in the first half of the 19th century.
The Second Kamchatka Expedition under Vitus Bering systematically mapped the entire coast of the sea, starting in 1733. Jean-François de La Pérouse and William Robert Broughton were the first non-Russian European navigators known to have passed through these waters other than Maarten Gerritsz Vries. Ivan Krusenstern explored the eastern coast of Sakhalin in 1805. Mamiya Rinzō and Gennady Nevelskoy determined that the Sakhalin was indeed an island separated from the mainland by a narrow strait; the first detailed summary of the hydrology of the Okhotsk sea was prepared and published by Stepan Makarov in 1894. The Sea of Okhotsk is one of the world's richest in biological resources, with various kinds of fish and crabs; the harsh conditions of crab fishing in the Sea of Okhotsk is the subject of the most famous novel of the Japanese writer Takiji Kobayashi,'The Crab Cannery Ship'. American and European whaleships hunted whales in the sea in the nineteenth and early twentieth centuries, they caught right and bowhead whales.
A number of ships were wrecked in the sea. During the Cold War, the Sea of Okhotsk was the scene of several successful U. S. Navy operations to tap Soviet Navy undersea communications cables; these operations were documented in the book Blind Man's Bluff: The Untold Story of American Submarine Espionage. The sea were the scene of the Soviet attack on Korean Air Flight 007 in 1983; the Soviet Pacific Fleet used the Sea as a ballistic missile submarine bastion, a strategy that Russia continues. In the Japanese language, the sea has no traditional Japanese name despite its close location to the Japanese territories and is called Ohōtsuku-kai, a transcription of the Russian name. Additionally, Okhotsk Subprefecture, Hokkaidō which faces the sea known as Okhotsk region, is named after the sea. 29 zones of possible oil and gas accumulation have been identified on the Sea of Okhotsk shelf, which runs along the coast. Total reserves are estimated at 3.5 billion tons of equivalent fuel, including 1.2 billion tons of oil and 1.5 billion cubic meters of gas.
On 18 Decembe
Guam is an unincorporated and organized territory of the United States in Micronesia in the western Pacific Ocean. It is the easternmost point and territory of the United States, along with the Northern Mariana Islands; the capital city of Guam is Hagåtña and the most populous city is Dededo. The inhabitants of Guam are called Guamanians, they are American citizens by birth. Indigenous Guamanians are the Chamorros, who are related to other Austronesian natives of Eastern Indonesia, the Philippines, Taiwan. Guam has been a member of the Pacific Community since 1983. In 2016, 162,742 people resided on Guam. Guam has a population density of 775 per square mile. In Oceania, it is the largest and southernmost of the Mariana Islands and the largest island in Micronesia. Among its municipalities, Mongmong-Toto-Maite has the highest population density at 3,691 per square mile, whereas Inarajan and Umatac have the lowest density at 119 per square mile; the highest point is Mount Lamlam at 1,332 feet above sea level.
Since the 1960s, the economy has been supported by two industries: tourism and the United States Armed Forces. The indigenous Chamorros settled the island 4,000 years ago. Portuguese explorer Ferdinand Magellan, while in the service of Spain, was the first European to visit the island, on March 6, 1521. Guam was colonized by Spain in 1668 with settlers, including Diego Luis de San Vitores, a Catholic Jesuit missionary. Between the 16th century and the 18th century, Guam was an important stopover for the Spanish Manila Galleons. During the Spanish–American War, the United States captured Guam on June 21, 1898. Under the Treaty of Paris, Spain ceded Guam to the United States on December 10, 1898. Guam is among the 17 non-self-governing territories listed by the United Nations. Before World War II, there were five American jurisdictions in the Pacific Ocean: Guam and Wake Island in Micronesia, American Samoa and Hawaii in Polynesia, the Philippines. On December 7, 1941, hours after the attack on Pearl Harbor, Guam was captured by the Japanese, who occupied the island for two and a half years.
During the occupation, Guamanians were subjected to beheadings, forced labor and torture. American forces recaptured the island on July 21, 1944. An unofficial but used territorial motto is "Where America's Day Begins", which refers to the island's close proximity to the international date line; the original inhabitants of Guam and the Northern Mariana Islands were the Chamorro people, who are believed to be descendants of Austronesian people originating from Southeast Asia as early as 2000 BC. The ancient Chamorro society had four classes: chamorri, matua and mana'chang; the matua were located in the coastal villages, which meant they had the best access to fishing grounds, whereas the mana'chang were located in the interior of the island. Matua and mana'chang communicated with each other, matua used achaot as intermediaries. There were "makåhna" or "kakahna", shamans with magical powers and "Suruhånu" or "Suruhåna" healers who use different kinds of plants and natural materials to make medicine.
Belief in spirits of ancient Chamorros called "Taotao mo'na" still persists as a remnant of pre-European culture. It is believed that "Suruhånu" or "Suruhåna" are the only ones who can safely harvest plants and other natural materials from their homes or "hålomtåno" without incurring the wrath of the "Taotao mo'na", their society was organized along matrilineal clans. Latte stones are stone pillars; the latte-stone was used as a foundation. Latte stones consist of a base shaped from limestone called the haligi and with a capstone, or tåsa, made either from a large brain coral or limestone, placed on top. A possible source for these stones, the Rota Latte Stone Quarry, was discovered in 1925 on Rota; the first European to travel to Guam was Portuguese navigator Ferdinand Magellan, sailing for the King of Spain, when he sighted the island on March 6, 1521, during his fleet's circumnavigation of the globe. When Magellan arrived on Guam, he was greeted by hundreds of small outrigger canoes that appeared to be flying over the water, due to their considerable speed.
These outrigger canoes were called Proas, resulted in Magellan naming Guam Islas de las Velas Latinas. Antonio Pigafetta said that the name was "Island of Sails", but he writes that the inhabitants "entered the ships and stole whatever they could lay their hands on", including "the small boat, fastened to the poop of the flagship." "Those people are poor, but ingenious and thievish, on account of which we called those three islands Islas de los Ladrones." Despite Magellan's visit, Guam was not claimed by Spain until January 26, 1565, by General Miguel López de Legazpi. From 1565 to 1815, Guam and the Northern Mariana Islands, the only Spanish outposts in the Pacific Ocean east of the Philippines, were an important resting stop for the Manila galleons, a fleet that covered the Pacific trade route between Acapulco and Manila. To protect these Pacific fleets, Spain built several defensive structures that still stand today, such as Fort Nuestra Señora de la Soledad in Umatac. Guam is the biggest single segment of Micronesia, the largest islands between the island of Kyushu, New Guinea, the Philippines, the Hawaiian Islands.
Spanish colonization commenced on June 15, 1