In "Edge of Tomorrow" (or "Live. Die. Repeat.") the protagonist Cage was railroaded and dumped on the forward operating base Heathrow. He is woken with a kick, and has to deal with the man in charge of the new recruits, US Army Master Sergeant Farell. Cage asks:
Cage: Name is Farell (?)
Farell: That's right.
Farell: Master Sergeant Farell.
Cage: Master Sergeant Farell, You're an American.
Farell: No, sir. I'm from Kentucky.
Why exactly would Farell say that? He's obviously American. He's from Science Hill, Kentucky, in the US. His uniform has the U.S. flag on his shoulders. It seems odd he would deny being American, normally a point of pride for jar-heads like him.