Gunnery Seargant Thomas Highway: The United States Marines is lookin' for a few good men - and you ain't it.
Gunnery Seargant Thomas Highway: Sergeant, get that contraband stogie out of my face before I shove it so far up your ass that you'll have to stick a match up your nose to light it!
Chosen answer: Gunny Highway insisted that they all wear the same shirts as he himself was wearing. If they showed up in a different one, he made them go shirtless. The reasons for this were 1) to break through their rebellious attitudes and teach them to follow his orders, 2) to make them look and feel unified, and 3) to develop resourcefulness and adaptability in them.
Chanteuse66
To also display esprit de corp to other units gaining them respect from those units as well as command leadership.