腹背受敌

fùbèi-shòudí

[be attacked front and rear; be surrounded back and belly; be surrounded by the enemy at the front and rear] 前面后背受到敌人夹击

今则脊尾俱摇, 腹背受敌, 旧地皆失。 --《挥麈三录》引王襄檄文