In summer, as Rakovsky's government briefly lost control of Ukraine, his policies became hotly contested by partisans of Ukrainian autonomy inside the Party, who held a conference in Homyel (one which Rakovsky did not attend). At the Fourth Congress of the Ukrainian Party (March 1920), the leadership of Rakovsky, Stanislav Kosior, and Dmitry Manuilsky was not reelected. Attacks on them caused problems with the Russian Party; as Lenin himself sided with Rakovsky, a delegation comprising Trotsky, Lev Kamenev and Adolph Joffe left for Kyiv to discuss the matter with local leaders. In order to curb the crisis, the Ukrainian Party was subjected to a major purge, during which pro-autonomy opposition was removed from its ranks and the former leaders were reinstated.