1912-1989. Hungarian Communist leader, in power 1956-88, after suppressing the national rising. As Hungarian Socialist Workers' Party (HSWP) leader and prime minister 1956-58 and 1961-65, Kadar introduced a series of market-socialist economic reforms, while retaining cordial political relations with the USSR. Kadar was a mechanic before joining the outlawed Communist Party and working as an underground resistance organizer in World War II. After the war he was elected to the National Assembly, served as minister for internal affairs 1948-50, and became a prominent member of the Hungarian Workers' Party (HSP). Imprisoned 1951-53 for deviation from Stalinism, Kadar was rehabilitated 1955, becoming party leader in Budapest, and in Nov 1956, at the height of the Hungarian national rising, he was appointed head of the new HSWP. With the help of Soviet troops, he suppressed the revolt. He was ousted as party general secretary May 1988, and forced into retirement May 1989.