The army and marines have a long history of success fighting guerillas. Even Vietnam, which conventional wisdom counts as a defeat, wasn’t. The conventional wisdom, as is often the case, is wrong. By the time the last U.S. combat units pulled out of South Vietnam in 1972, the local guerilla movement, the Viet Cong, was destroyed. North Vietnam came south three years later with a conventional invasion, sending tank and infantry divisions charging across the border and conquering their neighbor the old fashioned way.
When the United States got involved with South Vietnam in the late 1950s, there was good reason to believe American assistance would lead to the defeat of the communist guerilla movement there. In the previous two decades, there had been twelve communist insurgencies, and 75 percent of them had been defeated. These included Greek Civil War (1944-1949), Spanish Republican Insurgency (1944-1952), Iranian Communist Uprising (1945-1946), Philippine Huk War (1946-1954), Madagascan Nationalist Revolt (1947-1949), Korean Partisan War (1948-1953), Sarawak/Sabah “Confrontation” (1960-1966), Malayan Emergency (1948-1960), Kenyan Mau-Mau Rebellion (1952-1955). The communists won in the Cuban Revolution (1956-1958), the First Indochina War (1945-1954) and the Chinese Civil War (1945-1949). The communists went on to lose the guerilla phase of the Second Indochina War (1959-1970).