The Battle of Mesambria was a battle between the Byzantines and the Bulgarians during the war of Khan Krum. In this battle, during the night attack, the Byzantines under the command of their Emperor Leo V almost completely defeated the Bulgarians.
Sources
Wasilewski T. Historia Buà Âgarii. â Wrocà Âaw: Ossolineum, 1983,àp. 49. â ISBN 83-0402466-7