"We did it, we time travelled!"
"But to what year?"
"Let me ask that guy over there."
"What's up with the president?"
"Republican idiot's starting a war over oil."
"I have no idea."
By my count, that's at least a 70-year window. I should mention that the public at the time might not have thought of it that way. Some of the blood-for-oil conflicts were branded as anti-communism. They might have been that, too, that is, keeping the oil out of Soviet hands.
Edit: changed "ant-communism" to "anti-communism." Sorry for the goof. Obviously ants are still monarchists.