Army?

Well, my birthday is in 20 days, and I'm not sure I'm that happy about it. I recieved something from the army when I graduated from High School, and it said I had signed up for the army and as soon as I turn 18 that I'll be in it because of the Pell-Grant Tuition. I don't believe in the Army, seriously, I don't see how you defend your country putting inocent men in the line of fire, just because this old geever decides to call war. How many soldiers haven't already died? And I personally don't believe in killing others, no matter how tempted I feel to kill some people sometimes. I am so against war, politics, killing, what's the point? Why do we have to go to war?