Do you think that freedom can truly fought for through violence or war?

If you have to fight are you truly free? I just need some perspective on war and violence. I don't understand how someone can send little boys to learn how to kill "very efficiently I might add" and feel ok about this. It just seems very contradictory to FIGHT for PEACE. I know that tribal warfare has been a part of our history for thousands of years, will it take an asteroid to make us learn a peaceful existence? I have a feeling this is what is on the horizon. Near global extinction is what it will take.