[Bus Insider] During the Vietnam War, the US military relied heavily on special-operations forces to wage what was a predominately unconventional conflict.Individual units, such as the Army Green Berets, Navy SEALs, and Air Commandos, supported the war strategy, but the Pentagon also created a dedicated special-operations organization.
Military Assistance Command Vietnam-Studies and Observations Group (MACV-SOG) was a covert special-operations unit that conducted operations in Laos, Cambodia, Thailand, North Vietnam, and elsewhere.
Their highly classified missions came at a cost. The unit had a 100% casualty rate, meaning all its members were wounded at least once or killed in action. The outsize risk they faced was matched by their effectiveness. Time and again, MACV-SOG teams achieved great results.