April 6 events in history

402 Stilicho stymies the Visigoths under Alaric in the Battle of Pollentia
1199 King Richard I of England dies from an infection following the removal of an arrow from his shoulder
1250 Seventh Crusade: Ayyubids of Egypt capture King Louis IX of France in the Battle of Fariskur
1320 The Scots reaffirm their independence by signing the Declaration of Arbroath
1327 The poet Petrarch first sees his idealized love, Laura, in the church of Saint Clare in Avignon
1385 John, Master of the Order of Aviz, is made king John I of Portugal
1453 Mehmed II begins his siege of Constantinople (Istanbul), which falls on May 29
1580 One of the largest earthquakes recorded in the history of England, Flanders, or Northern France, takes place
1652 At the Cape of Good Hope, Dutch sailor Jan van Riebeeck establishes a resupply camp that eventually becomes Cape Town
1667 An earthquake devastates Dubrovnik, then an independent city-state
1712 The New York Slave Revolt of 1712 begins near Broadway
1776 American Revolutionary War: Ships of the Continental Navy fail in their attempt to capture a Royal Navy dispatch boat
1782 King Buddha Yodfa Chulaloke (Rama I) of Siam (modern day Thailand) founded the Chakri dynasty
1793 During the French Revolution, the Committee of Public Safety becomes the executive organ of the republic
1808 John Jacob Astor incorporates the American Fur Company, that would eventually make him America's first millionaire
1812 British forces under the command of the Duke of Wellington assault the fortress of Badajoz. This would be the turning point in the Peninsular War against Napoleon-led France
1814 Nominal beginning of the Bourbon Restoration; anniversary date that Napoleon abdicates and is exiled to Elba
1830 Church of Christ, the original church of the Latter Day Saint movement, is organized by Joseph Smith, Jr. and others at Fayette or Manchester, New York
1860 The Reorganized Church of Jesus Christ of Latter Day Saints—later renamed Community of Christ—is organized by Joseph Smith III and others at Amboy, Illinois
1861 First performance of Arthur Sullivan's debut success, his suite of incidental music for The Tempest, leading to a career that included the famous Gilbert and Sullivan operas
1862 American Civil War: The Battle of Shiloh begins – in Tennessee, forces under Union General Ulysses S. Grant meet Confederate troops led by General Albert Sidney Johnston
1865 American Civil War: The Battle of Sayler's Creek – Confederate General Robert E. Lee's Army of Northern Virginia fights its last major battle while in retreat from Richmond, Virginia
1866 The Grand Army of the Republic, an American patriotic organization composed of Union veterans of the American Civil War, is founded. It lasts until 1956
1869 Celluloid is patented
1888 Thomas Green Clemson dies, bequeathing his estate to the State of South Carolina to establish Clemson Agricultural College
1893 Salt Lake Temple of The Church of Jesus Christ of Latter-day Saints is dedicated by Wilford Woodruff
1895 Oscar Wilde is arrested in the Cadogan Hotel, London after losing a libel case against the Marquess of Queensberry
1896 In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman Emperor Theodosius I
1909 Robert Peary and Matthew Henson reach the North Pole
1911 During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skenderbeg)
1917 World War I: The United States declares war on Germany (see President Woodrow Wilson's address to Congress)
1919 Mohandas Karamchand Gandhi orders a general strike
1923 The first Prefects Board in Southeast Asia is formed in Victoria Institution, Malaysia
1924 First round-the-world flight commences
1926 Varney Airlines makes its first commercial flight (Varney is the root company of United Airlines)
1929 Huey P. Long Governor of Louisiana is impeached by the Louisiana House of Representatives
1930 Gandhi raises a lump of mud and salt and declares, "With this, I am shaking the foundations of the British Empire," beginning the Salt Satyagraha
1936 Tupelo-Gainesville tornado outbreak: Another tornado from the same storm system as the Tupelo tornado hits Gainesville, Georgia, killing 203
1941 World War II: Nazi Germany launches Operation 25 (the invasion of Kingdom of Yugoslavia) and Operation Marita (the invasion of Greece)
1945 World War II: Sarajevo is liberated from German and Croatian forces by the Yugoslav Partisans
1945 World War II: the Battle of Slater's Knoll on Bougainville comes to an end
1947 The first Tony Awards are presented for theatrical achievement
1957 Greek shipping tycoon Aristotle Onassis buys the Hellenic National Airlines (TAE) and founds Olympic Airlines
1962 Leonard Bernstein causes controversy with his remarks from the podium during a New York Philharmonic concert featuring Glenn Gould performing Brahms' First Piano Concerto
1965 Launch of Early Bird, the first communications satellite to be placed in geosynchronous orbit
1965 The British Government announces the cancellation of the TSR-2 aircraft project
1968 In Richmond, Indiana's downtown district, a double explosion kills 41 and injures 150
1968 Pierre Elliot Trudeau wins the Liberal Leadership Election, and becomes Prime Minister of Canada soon after
1970 Newhall Incident: Four California Highway Patrol officers are killed in a shootout
1972 Vietnam War: Easter Offensive – American forces begin sustained air strikes and naval bombardments