A great imperial expedition under Leo Phokas and Romanos Lekapenos ended again with a crushing Byzantine defeat at the Battle of Anchialus (917), and the following year the Bulgarians ravaged modern-day northern Greece south to Corinth. Adrianople was captured again in 923 and in 924 the Bulgarian army laid siege to Constantinople. Pressure from the North was alleviated only after Simeon's death in 927.