Long Walls
After the Avar Khagan Bayan I and the Byzantine Emperor Emperor Maurice concluded a treaty in 584, Ardagast raided Thrace, penetrating as far as the Long Wall. The Slavs suffered defeats only twice: at the Erginia river near the Long Walls (583) and in the Ansinon neighbourhood of Hadrianople at the hands of Comentiolus. The Slavs were later driven out of the "Astica" region.