Events on 20 August 57
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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.
Year 917
Battle of Acheloos: Tsar Simeon I of Bulgaria decisively defeats a Byzantine army.
Year 1000
The foundation of the Hungarian state by Saint Stephen, celebrated as a National Day in Hungary.
Year 1083
Canonization of the first King of Hungary, Saint Stephen and his son Saint Emeric.
Year 1191
Richard I of England initiates the Massacre at Ayyadieh, leaving 2,600-3,000 Muslim hostages dead.
Year 1308
Pope Clement V pardons Jacques de Molay, the last Grand Master of the Knights Templar, absolving him of charges of heresy.
Year 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.
Year 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.
Public Holidays Around The World On This Day 3
Birthdays on 20 August 273
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Deaths on 20 August 102
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