敌国外患

Explanation: Refers to the aggressive harassment from hostile countries. 　　Source: "Mencius Gaozi down" into the brush can not home persons, out of the invincibility of foreign patients, Kwok-hang death. " 　　Examples: ~, No date has been Feng Ling. ★ Binglin "military governors of" Thesaurus:  city being under siege, Large contingent Yajing