34 events
Polish–Soviet War: The Polish army launched the Vilna offensive to capture Vilnius (now in Lithuania) from the Red Army.
World War I: Several French army corps began a massive assault against the German-occupied Chemin des Dames ridge, south of Laon, France.
World War I: Hit by ground fire, French aviation pioneer Roland Garros (pictured) landed his aircraft behind enemy lines and was taken prisoner by German forces.
Minas Geraes (pictured), the first of three Brazilian dreadnought battleships, was laid down, sparking a vastly expensive South American naval arms race with Argentina and Chile.
American Civil War: African-American Union soldiers were massacred and mutilated during and after the Battle of Poison Spring.
Slavery in Washington, D.C., ended when the District of Columbia Compensated Emancipation Act became law.
Napoleonic Wars: After a three-day chase, the French ship D'Hautpoul was captured off Puerto Rico by a British squadron under Alexander Cochrane.
French Revolutionary Wars: Severely outnumbered French forces repulsed an Ottoman attack at the Battle of Mount Tabor in present-day Israel.
French Revolutionary Wars: British forces commanded by Lieutenant-General Ralph Abercromby invaded the Spanish colonial port of San Juan, Puerto Rico.
American Revolutionary War: Colonists Paul Revere and William Dawes, later joined by Samuel Prescott, began a midnight ride to warn residents of Lexington and Concord, Massachuset…
Glorious Revolution: Provincial militia and citizens in Boston revolted, arresting officials of the Dominion of New England.
A revolt of citizens in Toledo, Castile, opposed to the rule of the foreign-born Charles I began when the royal government attempted to unseat radical city councilors.
Lithuanian Crusade: After a month-long siege, the Teutonic Order captured and destroyed Kaunas Castle, which was defended by troops of the Grand Duchy of Lithuania.
After defeat by Vitellius' troops at Bedriacum, Roman emperor Otho killed himself.