WHAT HAPPENED ON 12. DECEMBER
Want to find out what all happened on 12. December

Battle of Nineveh: A Byzantine army under Emperor Heraclius defeats Emperor Khosrau II's Persian forces, commanded by General Rhahzadh. (12. December 627)

First Crusade: Siege of Ma'arrat al-Numan – Crusaders breach the town's walls and massacre about 20,000 inhabitants. After finding themselves with insufficient food, they reportedly resort to cannibalism. (12. December 1098)

Maria of Enghien sells the lordship of Argos and Nauplia to the Republic of Venice. (12. December 1388)

The Order of the Dragon a monarchical chivalric order is created by Sigismund of Luxembourg, then King of Hungary. (12. December 1408)

American Revolutionary War: Second Battle of Ushant – A British fleet led by HMS Victory defeats a French fleet. (12. December 1781)

Pennsylvania becomes the second state to ratify the United States Constitution, five days after Delaware became the first. (12. December 1787)

USS Cairo sinks on the Yazoo River, becoming the first armored ship to be sunk by an electrically detonated mine. (12. December 1862)

Joseph H. Rainey of South Carolina becomes the second black U.S. congressman, the first being Hiram Revels. (12. December 1870)

Belo Horizonte, the first planned city in Brazil, is founded. (12. December 1897)

Guglielmo Marconi receives the first transatlantic radio signal (the letter "S" [***] in Morse Code), at Signal Hill in St John's, Newfoundland. (12. December 1901)

Delhi replaces Calcutta as the capital of India. (12. December 1911)

King George V and Mary of Teck are enthroned as Emperor and Empress of India. (12. December 1911)

President of the Republic of China, Yuan Shikai, announces his intention to reinstate the monarchy and proclaim himself Emperor of China. (12. December 1915)

In Nebraska, Father Edward J. Flanagan founds Boys Town as a farm village for wayward boys. (12. December 1917)

The Flag of Estonia is raised atop the Pikk Hermann for the first time. (12. December 1918)

The Majlis of Iran votes to crown Reza Khan as the new Shah of Persia. (12. December 1925)

Lebensborn Project, a Nazi reproduction program, is founded by Heinrich Himmler. (12. December 1935)

Xi'an Incident: The Generalissimo of the Republic of China, Chiang Kai-shek, is kidnapped by Zhang Xueliang. (12. December 1936)

Second Sino-Japanese War: USS Panay incident – Japanese aircraft bomb and sink U.S. gunboat USS Panay on the Yangtze River in China. (12. December 1937)

Winter War: Battle of Tolvajärvi – Finnish forces defeat those of the Soviet Union in their first major victory of the conflict. (12. December 1939)