facing a powerful enemy (idiom) / fig. confronting grave difficulties / Enemy at the Gates, 1991 movie by Jean-Jacques Annaud
城门失火,殃及池鱼
chéng mén shī huǒ , yāng jí chí yú
a fire in the city gates is also a calamity for the fish in the moat (idiom) / the bystander will also suffer / fig. you can't escape responsibility for your actions / ask not for whom the bell tolls - it tolls for thee