HELP!!!...looking for a poem about war...

I forgot who wrote it, but I saw it recently....it had something like

"now I am changed"...

it is about a man who goes to war not caring about dying, then after seeing all the death involved, he get mental issues,and regrets going...

anyone know who wrote it? they are on this website...

sorry i don't but it sounds like a cool poem, if u find it i want to read it.

~PLP~ lil slam~