#1. Place your military units FAR AWAY from any civilian areas.
#2. Wait for us to hit you with long range missiles and bombs.
#3. Surrender.
Personally, I'm recommending arena combat. One on one. Knife fighting.
Then we'll see who's "brave" and who's a "coward".
No civilian injuries.
No infrastructure damage.
Anyone who wants to surrender rather than fight is taken away by the opposing nation.