Battle of the Gates of Trajan

Bulgarian resistance revived under the rule of the Cometopuli dynasty, but the new Emperor Basil II (r. 976–1025) made the submission of the Bulgarians his primary goal. Basil's first expedition against Bulgaria, however, resulted in a defeat at the Gates of Trajan. For the next few years, the emperor was preoccupied with internal revolts in Anatolia, while the Bulgarians expanded their realm in the Balkans.