The rank symbols can vary broadly for enlisted troops, with the Marine Corps and Army having many commonalities, and the Coast Guard and Navy again mirroring each other.

The lowest of the general officer ranks, Brigadier generals in the Marine Corps are one-star general officers. They preside over 10,000 to 15,000 Marines and are in charge of tactical planning and ...

Marine Corps Sgt. Maj. Robert Clark, who has known Singh since 1987 and helped get Singh back on active duty, also attended the promotion and pinned the rank on Singh.