When the brown round campaign hat became the standardized headgear for all Army drill sergeants it was an end of an era and the merger of one standard.

Add Yahoo as a preferred source to see more of our stories on Google. U.S. Army drill sergeants encourage a trainee on the first day of Basic Combat Training at Fort Jackson, South Carolina. (Spc.

Male and female drill sergeants will all wear the same iconic campaign hat, after surveys by the U.S. Army.