ENEMYS

If thine enemy be hungry, give him bread to eat: and if he be thirsty, give him water to drink: For thou shalt heap coals of fire upon his head, and the Lord shall reward thee. Proverbs 25:21,22

By showing true compassion and love to your enemy it may not stop him from doing you harm but in the end an aggressor can't sustain aggression toward someone that doesn't fight back. They will lose face due to your actions. Also winning isn't everything, the promise of reward isn't given to the winner it is given to the one that follows the Lords will by showing compassion to their enemy. The Lords reward is far greater than winning ever will be!
God has never asked us to do something with out a promise attached to it. But don't fall into the trap of doing things just for the reward, do them because it is the Lords will, and then you will receive His reward.

At least that is what I think.