Day In History
This Day in History
Today: August 20, 2026
14
Agrippa Postumus, maternal grandson of the late Roman emperor Augustus, is mysteriously executed by his guards while in exile.
636
Battle of Yarmouk: Arab forces led by Khalid ibn al-Walid take control of the Levant away from the Byzantine Empire, marking the first great wave of Muslim conquests and the rapid advance of Islam outside Arabia.
917
Battle of Acheloos: Tsar Simeon I of Bulgaria decisively defeats a Byzantine army.
1083
Canonization of the first King of Hungary, Saint Stephen and his son Saint Emeric celebrated as a National Day in Hungary.
1191
Richard I of England initiates the Massacre at Ayyadieh, leaving 2,600–3,000 Muslim hostages dead.
1308
Pope Clement V pardons Jacques de Molay, the last Grand Master of the Knights Templar, absolving him of charges of heresy.
1391
Konrad von Wallenrode becomes the 24th Grand Master of the Teutonic Order.
1467
The Second Battle of Olmedo takes places as part of a succession conflict between Henry IV of Castile and his half-brother Alfonso, Prince of Asturias.
1519
Philosopher and general Wang Yangming defeats Zhu Chenhao, ending the Prince of Ning rebellion against the reign of the Ming dynasty's Zhengde Emperor.
1648
The Battle of Lens is the last major military confrontation of the Thirty Years' War, contributing to the signing of the Peace of Westphalia in October that year.[1]
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