外敌

wài dí de rù qīn

外敌的入侵

foreign invasion

gāi guó yǐ dé dào chéng nuò yǒu wài dí wēi xié shí huì huò dé jūn shì yuán zhù

该国已得到承诺，有外敌威胁时会获得军事援助。

The country was promised military aid in the case of external threat.