After the Anglo-Soviet invasion of Iran in 1941 during World War II, he went on with armed struggle and resisted the occupation before being arrested by the British forces. He was instrumental in many of the nationalist policies in the 1950-1960s. During the military campaign of 1964-65 he successfully pacified rebellious tribes in the south of Iran (Pars, Isfahan and Khuzestan) stirred-up by Ayatollah Ruhollah Khomeini, without shedding blood.