May 15 events in history

392 Emperor Valentinian II is assassinated while advancing into Gaul against the Frankish usurper Arbogast. He is found hanging in his residence at Vienne
589 King Authari marries Theodelinda, daughter of the Bavarian duke Garibald I. A Catholic, she has great influence among the Lombard nobility
1252 Pope Innocent IV issues the papal bull ad extirpanda, which authorizes, but also limits, the torture of heretics in the Medieval Inquisition
1525 Insurgent peasants led by Anabaptist pastor Thomas Müntzer were defeated at the Battle of Frankenhausen, ending the German Peasants' War in the Holy Roman Empire
1536 Anne Boleyn, Queen of England, stands trial in London on charges of treason, adultery and incest. She is condemned to death by a specially-selected jury
1567 Mary, Queen of Scots marries James Hepburn, 4th Earl of Bothwell, her third husband
1602 Bartholomew Gosnold becomes the first recorded European to see Cape Cod
1618 Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made)
1648 The Treaty of Westphalia is signed
1701 The War of the Spanish Succession begins
1718 James Puckle, a London lawyer, patents the world's first machine gun
1755 Laredo, Texas is established by the Spaniards
1776 American Revolution: the Virginia Convention instructs its Continental Congress delegation to propose a resolution of independence from Great Britain, paving the way for the United States Declaration of Independence
1791 French Revolution: Maximilien Robespierre proposes the Self-denying Ordinance
1792 War of the First Coalition: France declares war on Kingdom of Sardinia
1793 Diego Marín Aguilera flies a glider for "about 360 meters", at a height of 5–6 meters, during one of the first attempted manned flights
1796 First Coalition: Napoleon enters Milan in triumph
1800 King George III of the United Kingdom survives an assassination attempt by James Hadfield, who is later acquitted by reason of insanity
1811 Paraguay declares independence from Spain
1817 Opening of the first private mental health hospital in the United States, the Asylum for the Relief of Persons Deprived of the Use of Their Reason (now Friends Hospital) in Philadelphia, Pennsylvania
1836 Francis Baily observes "Baily's beads" during an annular eclipse
1849 Troops of the Two Sicilies take Palermo and crush the republican government of Sicily
1850 The Bloody Island Massacre takes place in Lake County, California, in which a large number of Pomo Indians in Lake County are slaughtered by a regiment of the United States Cavalry, led by Nathaniel Lyon
1858 Opening of the present Royal Opera House in Covent Garden, London
1862 President Abraham Lincoln signs a bill into law creating the United States Bureau of Agriculture. It is later renamed the United States Department of Agriculture
1864 American Civil War: Battle of Resaca, Georgia ends
1864 American Civil War: Battle of New Market, Virginia: Students from the Virginia Military Institute fight alongside the Confederate Army to force Union General Franz Sigel out of the Shenandoah Valley
1869 Women's suffrage: in New York, Susan B. Anthony and Elizabeth Cady Stanton form the National Woman Suffrage Association
1891 Pope Leo XIII defends workers' rights and property rights in the encyclical Rerum Novarum, the beginning of modern Catholic social teaching
1904 Russo-Japanese War: The Russian minelayer Amur lays a minefield about 15 miles off Port Arthur and sinks Japan's battleships Hatsuse, 15,000 tons, with 496 crew and Yashima
1905 Las Vegas, is founded when 110 acres (0.45 km2), in what later would become downtown, are auctioned off
1911 In Standard Oil Company of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up
1911 303 Chinese and 5 Japanese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Francisco I. Madero's brother take the city of Torreón from the Federales
1919 The Winnipeg General Strike begins. By 11:00, almost the whole working population of Winnipeg, Manitoba had walked off the job
1919 Greek invasion of Smyrna. During the invasion, the Greek army kills or wounds 350 Turks. Those responsible are punished by the Greek Commander Aristides Stergiades
1928 Walt Disney character Mickey Mouse premieres in his first cartoon, Plane Crazy
1929 A fire at the Cleveland Clinic in Cleveland, Ohio kills 123
1932 In an attempted coup d'état, the Prime Minister of Japan Inukai Tsuyoshi is murdered
1934 Kārlis Ulmanis establishes an authoritarian government in Latvia
1935 The Moscow Metro is opened to the public
1940 USS Sailfish is recommissioned. It was originally the USS Squalus
1940 World War II: After fierce fighting, the poorly trained and equipped Dutch troops surrender to Germany, marking the beginning of five years of occupation
1940 McDonald's opens its first restaurant in San Bernardino, California
1941 First flight of the Gloster E.28/39 the first British and Allied jet aircraft
1942 World War II: in the United States, a bill creating the Women's Army Auxiliary Corps (WAAC) is signed into law
1943 Joseph Stalin dissolves the Comintern (or Third International)
1945 World War II: The Battle of Poljana, the final skirmish in Europe is fought near Prevalje, Slovenia
1948 Following the demise of Mandatory Palestine, the Kingdom of Egypt, Transjordan, Lebanon, Syria, Iraq and Saudi Arabia invade Israel thus starting the 1948 Arab–Israeli War
1951 The Polish cultural attaché in Paris, Czesław Miłosz, asks the French government for political asylum
1953 Cubmaster Don Murphy organized the first pinewood derby, in Manhattan Beach, California, by Pack 280c