内患外侮: (be plagued by) internal troubles and foreign aggression
同仇敌忾共御外侮: share bitter hatred against the enemy and jointly resist foreign aggression
Example Sentences:
1.
Repelling foreign invasion and reviving the people 抵御外侮复兴民族
2.
I read that the purpose of the wall was defense and communication 我从书上得知，建长城的目的是为了抵御外侮和通讯联络。
3.
" my flower is ephemeral , " the little prince said to himself , " and she has only four thorns to defend herself against the world 小王子自言自语地说： “我的花是短暂的，而且她只有四根刺来防御外侮！
