WHAT HAPPENED ON 15. DECEMBER
Want to find out what all happened on 15. December

Vandalic War: Byzantine general Belisarius defeats the Vandals, commanded by King Gelimer, at the Battle of Tricamarum. (15. December 533)

Pope Sergius I is elected. (15. December 687)

Jin–Song wars: Military officers conspire against Emperor Hailing of the Jin Dynasty after a military defeat at the Battle of Caishi, and assassinate the emperor at his camp. (15. December 1161)

Sicilian Chancellor Stephen du Perche moves the royal court to Messina to prevent a rebellion. (15. December 1167)

Hulagu Khan captures and destroys the Hashshashin stronghold at Alamut Castle (in present-day Iran) as part of the Mongol offensive on Islamic southwest Asia. (15. December 1256)

Stephen III of Moldavia defeats Matthias Corvinus of Hungary, with the latter being injured thrice, at the Battle of Baia. (15. December 1467)

American Revolutionary War: British and French fleets clash in the Battle of St. Lucia. (15. December 1778)

The United States Bill of Rights becomes law when ratified by the Virginia General Assembly. (15. December 1791)

American Civil War: Battle of Nashville – Union forces under George Thomas almost completely destroy the Army of Tennessee under John Hood. (15. December 1864)

Hunkpapa Lakota leader Sitting Bull is killed on Standing Rock Indian Reservation, leading to the Wounded Knee Massacre. (15. December 1890)

The Pushkin House is established in Saint Petersburg, Russia, to preserve the cultural heritage of Alexander Pushkin (15. December 1905)

The London Underground's Great Northern, Piccadilly and Brompton Railway opens. (15. December 1906)

Nicaragua becomes a signatory to the Buenos Aires Convention. (15. December 1913)

World War I: The Serbian Army recaptures Belgrade from the invading Austro-Hungarian Army. (15. December 1914)

A gas explosion at Mitsubishi Hōjō coal mine, in Kyushu, Japan, kills 687. (15. December 1914)

World War I: An armistice is reached between the new Bolshevik government and the Central Powers. (15. December 1917)

The Twenty-first Amendment to the United States Constitution officially becomes effective, repealing the Eighteenth Amendment that prohibited the sale, manufacture, and transportation of alcohol. (15. December 1933)

Gone with the Wind receives its premiere at Loew's Grand Theatre in Atlanta, Georgia, United States. (15. December 1939)

The Holocaust: German troops murder over 15,000 Jews at Drobytsky Yar, a ravine southeast of the city of Kharkiv, Ukraine, Soviet Union. (15. December 1941)

World War II: The Battle of Mount Austen, the Galloping Horse, and the Sea Horse begins during the Guadalcanal Campaign. (15. December 1942)