The Military Assistance Command Vietnam, Studies and Observations Group ran top-secret missions throughout Southeast Asia during the Vietnam War. These units would often be made up of two or three Green Berets who were leading a group comprised of several locals. They often worked far behind enemy lines and would coordinate attacks, destroy supplies, relay information, and infiltrate North Vietnamese command centers. Many of these recon teams went “sterile,” which meant they didn’t wear dog tags, U.S. uniforms, and carried a variety of weapons based on their mission. The SOG’s chief weapon was the 9 mm Luger Karl Gustav Model 1945 submachine gun and the 7.62×39 mm, Chinese Type 56 AKM.