This Day in History
Today: December 15, 2025
533
Vandalic War: Byzantine general Belisarius defeats the Vandals, commanded by King Gelimer, at the Battle of Tricamarum.[1]
687
Pope Sergius I is elected as a compromise between antipopes Paschal and Theodore.[2]
1025
Constantine VIII becomes sole emperor of the Byzantine Empire, 63 years after being crowned co-emperor.[3]
1161
Jin–Song wars: Military officers conspire against the emperor Wanyan Liang of the Jin dynasty after a military defeat at the Battle of Caishi, and assassinate the emperor at his camp.[4]
1167
Sicilian Chancellor Stephen du Perche moves the royal court to Messina to prevent a rebellion.
1256
Mongol forces under Hulagu enter and dismantle the Nizari Ismaili (Assassin) stronghold at Alamut Castle (in present-day Iran) as part of their offensive on Islamic southwest Asia.
1270
The Nizari Ismaili garrison of Gerdkuh, Persia surrender after 17 years to the Mongols.[5]
1467
Stephen III of Moldavia defeats Matthias Corvinus of Hungary, with the latter being injured thrice, at the Battle of Baia.
1546
The town of Ekenäs (Finnish: Tammisaari) is founded by King Gustav Vasa of Sweden.[6]
1651
Castle Cornet in Guernsey, the last stronghold which had supported the King in the Third English Civil War, surrenders.
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