Before 1917 there were 300,000 Zionists in Russia, while the main Jewish socialist organization, the Bund, had 33,000 members. Only 958 Jews had joined the Bolshevik Party before 1917; thousands joined after the Revolution. The chaotic years of World War I, the February and October Revolutions, and the Russian Civil War had created social disruption that led to anti-Semitism. Some 150,000 Jews were killed in the pogroms of 1918–1922, 125,000 of them in Ukraine, 25,000 in Belarus. The pogroms were mostly perpetrated by anti-communist forces; sometimes, Red Army units engaged in pogroms as well. Anton Denikin's White Army was a bastion of anti-Semitism, using "Strike at the Jews and save Russia!" as its motto. The Bolshevik Red Army, although individual soldiers committed anti-Semitic abuses, had a policy of opposing anti-Semitism, and as a result, it won the support of much of the Jewish population. After a short period of confusion, the Soviets started executing guilty individuals and even disbanding the army units whose men had attacked Jews. Although pogroms were still perpetrated after this, mainly by Ukrainian units of the Red Army during its retreat from Poland (1920), in general, the Jews regarded the Red Army as the only force which was able and willing to defend them. The Russian Civil War pogroms shocked world Jewry and rallied many Jews to the Red Army and the Soviet regime, strengthening the desire for the creation of a homeland for the Jewish people. In August 1919 the Soviet government arrested many rabbis, seized Jewish properties, including synagogues, and dissolved many Jewish communities. The Jewish section of the Communist Party labeled the use of the Hebrew language "reactionary" and "elitist" and the teaching of Hebrew was banned. Zionists were persecuted harshly, with Jewish communists leading the attacks.