This Battle of Adrianople occurred on April 14 1205 between Bulgars under Tsar Kaloyan, and Latins under the Latin emperor Baldwin I. It was won by the Bulgars after a skillful ambush. Around 300 Latin knights were killed, and the emperor was captured, later dying in captivity. The Bulgars then overran much of Thrace and Macedonia, exterminating a large part of the Greek population. Baldwin was succeeded by his younger brother, Henry, who took the throne on August 20, 1205.