After the abdication of Tsar Nicholas II, Ukrainian community leaders were able finally to organized the Central Rada in Kyiv ("Tsentral’na rada"), headed by Mykhailo Hrushevsky. They sought an approval of the Russian Provisional Government in Petrograd (St Petersburg) to establish a regional government. The Central Rada consisted of various political parties such as Ukrainian Party of Socialist Revolutionary, Ukrainian Social Democratic Labour Party, Russian Social Democratic Labour Party, General Jewish Labor Bund, Polish national party, representatives of Army, peasantry, workers, and others. It quickly gained the support of elements of the Imperial Army in Ukraine. On June 23, 1917, the Central Rada issued its First Universal, declaring Ukrainian autonomy within a Russian federation, which was enthusiastically supported by the First All-Ukrainian Peasant Congress on June 28.