同仇敌忾的英文：
[Literal Meaning]
confront a common enemy/hatred towards the enemy
with bitter hatred against the common enemy

[解释]
指所有人一致痛恨敌人。

[Explanation]
to share a hatred of enemy

[例子]
全国上下同仇敌忾，每一个人都出一份力来抵抗侵略。

[Example]
The whole nation shares a hatred of enemy and everyone did his bit to resist invasion.

A common danger causes common action
同仇敌忾

bear common hatred for the enemy;Fight shoulder to shoulder with
同仇敌忾