Khrushchev reversed the regime's policy of cooperation with the Russian Orthodox Church. Although it remained officially sanctioned, in 1959 Khrushchev launched an antireligious campaign that was continued in a less stringent manner by his successor, Brezhnev. By 1975 the number of active Russian Orthodox churches was reduced to 7,000. Some of the most prominent members of the Russian Orthodox hierarchy and some activists were jailed or forced to leave the church. Their place was taken by docile clergy who were obedient to the state and who were sometimes infiltrated by KGB agents, making the Russian Orthodox Church useful to the regime. It espoused and propagated Soviet foreign policy and furthered the russification of non-Russian Christians, such as Orthodox Ukrainians and Belarusians.