Who said "I've fought in a thousand wars. This is just another one."?

This quote is attributed to Black Widow / Natasha Romanoff.

I've fought in a thousand wars. This is just another one. - Black Widow / Natasha Romanoff

"I've fought in a thousand wars. This is just another one."

Black Widow / Natasha Romanoff War

"I used to have nothing. Then I got this job, this team. It's all I have."

"Compromise where you can. Where you can't, don't."

"I'm always picking up after you boys."

"The world doesn't change without sacrifice."

"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."