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==Events== *753 BC – Romulus founds Rome (traditional date). *43 BC – Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed. Antony fails to capture Mutina and Decimus Brutus is murdered shortly after. * 900 – The Laguna Copperplate Inscription (the earliest known written document found in what is now the Philippines): the Commander-in-Chief of the Kingdom of Tondo, as represented by the Honourable Jayadewa, Lord Minister of Pailah, pardons from all debt the Honourable Namwaran and his relations. *1092 – The Diocese of Pisa is elevated to the rank of metropolitan archdiocese by Pope Urban II *1506 – The three-day Lisbon Massacre comes to an end with the slaughter of over 1,900 suspected Jews by Portuguese Catholics. *1509 – Henry VIII ascends the throne of England on the death of his father, Henry VII. *1526 – The last ruler of the Lodi dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat. *1615 – The Wignacourt Aqueduct is inaugurated in Malta. *1782 – The city of Rattanakosin, now known internationally as Bangkok, is founded on the eastern bank of the Chao Phraya River by King Buddha Yodfa Chulaloke. *1792 – Tiradentes, a revolutionary leading a movement for Brazil's independence, is hanged, drawn and quartered. *1806 – Action of 21 April 1806: A French frigate escapes British forces off the coast of South Africa. *1809 – Two Austrian army corps are driven from Landshut by a First French Empire army led by Napoleon as two French corps to the north hold off the main Austrian army on the first day of the Battle of Eckmühl. *1821 – Benderli Ali Pasha arrives in Constantinople as the new Grand Vizier of the Ottoman Empire; he remains in power for only nine days before being sent into exile. *1836 – Texas Revolution: The Battle of San Jacinto: Republic of Texas forces under Sam Houston defeat troops under Mexican General Antonio López de Santa Anna. *1856 – Australian labour movement: Stonemasons and building workers on building sites around Melbourne march from the University of Melbourne to Parliament House to achieve an eight-hour day. *1863 – Bahá'u'lláh, the founder of the Bahá'í Faith, declares his mission as "He whom God shall make manifest". *1894 – Norway formally adopts the Krag–Jørgensen bolt-action rifle as the main arm of its armed forces, a weapon that would remain in service for almost 50 years. *1898 – Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date. *1914 – Ypiranga incident: A German arms shipment to Mexico is intercepted by the U.S. Navy near Veracruz. *1918 – World War I: German fighter ace Manfred von Richthofen, better known as "The Red Baron", is shot down and killed over Vaux-sur-Somme in France. *1925 – The Manifesto of the Fascist Intellectuals is published in ''Il Mondo'', establishing the political and ideological foundations of Italian Fascism. *1934 – The "Surgeon's Photograph", the most famous photo allegedly showing the Loch Ness Monster, is published in the ''Daily Mail'' (in 1999, it is revealed to be a hoax). *1941 – Emmanouil Tsouderos becomes the 132nd Prime Minister of Greece. *1945 – World War II: Soviet forces south of Berlin at Zossen attack the German High Command headquarters. *1952 – Secretary's Day (now Administrative Professionals' Day) is first celebrated. *1960 – Brasília, Brazil's capital, is officially inaugurated. At 09:30, the Three Powers of the Republic are simultaneously transferred from the old capital, Rio de Janeiro. *1962 – The Seattle World's Fair (Century 21 Exposition) opens. It is the first World's Fair in the United States since World War II. *1963 – The Universal House of Justice of the Bahá'í Faith is elected for the first time. *1964 – A Transit-5bn satellite fails to reach orbit after launch; as it re-enters the atmosphere, of radioactive plutonium in its SNAP RTG power source is widely dispersed. *1965 – The 1964–1965 New York World's Fair opens for its second and final season. *1966 – Rastafari movement: Haile Selassie of Ethiopia visits Jamaica, an event now celebrated as Grounation Day. *1967 – Greek military junta of 1967–74: A few days before the general election in Greece, Colonel George Papadopoulos leads a coup d'état, establishing a military regime that lasts for seven years. *1970 – The Hutt River Province secedes from Australia as the Principality of Hutt River. *1975 – Vietnam War: President of South Vietnam Nguyễn Văn Thiệu flees Saigon, as Xuân Lộc, the last South Vietnamese outpost blocking a direct North Vietnamese assault on Saigon, falls. *1982 – Baseball: Rollie Fingers of the Milwaukee Brewers becomes the first pitcher to record 300 saves. *1985 – The compound of the militant group The Covenant, The Sword, and the Arm of the Lord surrenders to federal authorities in Arkansas after a two-day government siege. *1987 – The Tamil Tigers are blamed for a car bomb that detonates in the Sri Lankan capital city of Colombo, killing 106 people. *1989 – Tiananmen Square protests of 1989: In Beijing, around 100,000 students gather in Tiananmen Square to commemorate Chinese reform leader Hu Yaobang. *1992 – The first discoveries of extrasolar planets are announced by astronomers Aleksander Wolszczan and Dale Frail. They discovered two planets orbiting the pulsar PSR 1257+12. *1993 – The Supreme Court in La Paz, Bolivia, sentences former dictator Luis García Meza to 30 years in jail without parole for murder, theft, fraud and violating the constitution. *2004 – Five suicide car bombers target police stations in and around Basra, killing 74 people and wounding 160. *2010 – The controversial Kharkiv Pact (Russian Ukrainian Naval Base for Gas Treaty) is signed in Kharkiv, Ukraine, by Ukrainian President Viktor Yanukovych and Russian President Dmitry Medvedev; it will be unilaterally terminated by Russia on March 31, 2014. *2012 – Two trains are involved in a head-on collision near Sloterdijk, Amsterdam, in the Netherlands, injuring 116 people. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「April 21」の詳細全文を読む スポンサード リンク
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