April 17 events in history

69 After the First Battle of Bedriacum, Vitellius becomes Roman Emperor
1080 The King of Denmark Harald III dies and is succeeded by Canute IV, who would later be the first Dane to be canonized
1349 Fall of the Bavand dynasty, and rise of the Afrasiyab dynasty
1397 Geoffrey Chaucer tells The Canterbury Tales for the first time at the court of Richard II. Chaucer scholars have also identified this date (in 1387) as the start of the book's pilgrimage to Canterbury
1492 Spain and Christopher Columbus sign the Capitulations of Santa Fe for his voyage to Asia to acquire spices
1521 Trial of Martin Luther over his teachings begins during the assembly of the Diet of Worms. Initially intimidated, he asks for time to reflect before answering and is given a stay of one day
1524 Giovanni da Verrazzano reaches New York harbor
1555 After 18 months of siege, Siena surrenders to the Florentine-Imperial army. The Republic of Siena is incorporated into the Grand Duchy of Tuscany
1797 Sir Ralph Abercromby attacks San Juan, Puerto Rico, in what would be one of the largest invasions of the Spanish territories in America
1797 Citizens of Verona, Italy, begin an eight-day rebellion against the French occupying forces, which will end unsuccessfully
1863 American Civil War: Grierson's Raid begins – troops under Union Army Colonel Benjamin Grierson attack central Mississippi
1864 American Civil War: The Battle of Plymouth begins – Confederate forces attack Plymouth, North Carolina
1895 The Treaty of Shimonoseki between China and Japan is signed. This marks the end of the First Sino-Japanese War, and the defeated Qing Empire is forced to renounce its claims on Korea and to concede the southern portion of the Fengtien province, Taiwan and the Pescadores Islands to Japan
1897 The Aurora, Texas UFO incident
1905 The Supreme Court of the United States decides Lochner v. New York, which holds that the "right to free contract" is implicit in the due process clause of the Fourteenth Amendment of the United States Constitution
1907 The Ellis Island immigration center processes 11,747 people, more than on any other day
1912 Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150
1937 Daffy Duck's first appearance, in Porky's Duck Hunt
1941 World War II: The Kingdom of Yugoslavia surrenders to Germany
1942 French prisoner of war General Henri Giraud escapes from his castle prison in Festung Königstein
1944 Forces of the Communist-controlled Greek People's Liberation Army attack the smaller National and Social Liberation resistance group, which surrenders. Its leader Dimitrios Psarros is murdered
1945 World War II: Brazilian forces liberate the town of Montese, Italy, from Nazi forces
1946 Syria obtains its independence from the French occupation
1949 At midnight 26 Irish counties officially leave the British Commonwealth. A 21-gun salute on O'Connell Bridge, Dublin, ushers in the Republic of Ireland
1951 The Peak District becomes the United Kingdom's first National Park
1961 Bay of Pigs Invasion: A group of Cuban exiles financed and trained by the CIA lands at the Bay of Pigs in Cuba with the aim of ousting Fidel Castro
1964 Jerrie Mock becomes the first woman to circumnavigate the world by air
1964 Ford Mustang is introduced to the North American market
1969 Sirhan Sirhan is convicted of assassinating Robert F. Kennedy
1969 Czechoslovakian Communist Party chairman Alexander Dubček is deposed
1970 Apollo program: The ill-fated Apollo 13 spacecraft returns to Earth safely
1971 The People's Republic of Bangladesh forms, under Sheikh Mujibur Rahman at Mujibnagor
1973 George Lucas begins writing the treatment for The Star Wars
1975 The Cambodian Civil War ends. The Khmer Rouge captures the capital Phnom Penh and Cambodian government forces surrender
1978 Mir Akbar Khyber is assassinated, provoking a communist coup d'état in Afghanistan
1982 Patriation of the Canadian constitution in Ottawa by Proclamation of Queen Elizabeth II, Queen of Canada
1984 Police Constable Yvonne Fletcher is killed by gunfire from the Libyan People's Bureau (Embassy) in London during a small demonstration outside the embassy. Ten others are wounded. The events lead to an 11-day siege of the building
1986 The Three Hundred and Thirty Five Years' War between the Netherlands and the Isles of Scilly ends
1986 Nezar Hindawi's attempt to detonate a bomb aboard an El Al flight from London to Tel Aviv is thwarted
2006 Sami Hammad, a Palestinian suicide bomber, detonates an explosive device in Tel Aviv, killing 11 people and injuring 70
2013 An explosion at a fertilizer plant in the city of West, Texas, kills 15 people and injures 160 others
2014 NASA's Kepler confirms the discovery of the first Earth-size planet in the habitable zone of another star