US Marine Corps HMM-161 "VIETNAM 65-66" Patch
HMM-161: refers to Marine Medium Helicopter Squadron 161, which was later redesignated as Marine Medium Tiltrotor Squadron 161 (VMM-161).
"VIETNAM 65-66": signifies the squadron's deployment to Vietnam during the Vietnam War, specifically from May 1965 to April 1966.The squadron, known as the "Greyhawks," is based at MCAS Miramar, California.This patch is a historical artifact from the Vietnam War era, often collected as militaria.