Cambodia’s prime minister, Gen. Lon Nol, at a solidarity rally on April 16,1970, requested U.S. help to fight North Vietnamese troops who threatened his pro-West government. (Hulton Archive/Getty Images)
Cambodia’s prime minister, Gen. Lon Nol, at a solidarity rally on April 16,1970, requested U.S. help to fight North Vietnamese troops who threatened his pro-West government. (Hulton Archive/Getty Images)