After the victory, the Bulgars advanced south and seized the lands to the north of Stara Planina and in 681 they invaded Thrace defeating the Byzantines again.
The Bulgars advanced south. This was after the victory. The Bulgars seized the lands to the north of Stara Planina. This was after the victory. They invaded Thrace. This was in 681. This was after the victory. This Thrace was defeating the Byzantines again.