Who said "War is hell, but sometimes it's necessary."?

This quote is attributed to Rocket.

War is hell, but sometimes it's necessary. - Rocket

"War is hell, but sometimes it's necessary."

Rocket War

"I'm not a part of your team, I'm a part of the tree."

"You're making me very angry. And when I get angry, Mr. Murder pants gets scared."

"I have a plan. It might be crazy, it might get us all killed, but I have a plan."

"Don't call me a thief. I prefer the term 'unorthodox entrepreneur.'"

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."