The Central Committee (CC) composition was elected at the 17th Congress, and sat from 10 February 1934 until 22 March 1939. Its 1st Plenary Session renewed the composition of the Politburo, Secretariat and the Orgburo of the All-Union Communist Party (Bolsheviks). The 17th Congress was labelled the "Congress of Victors" to mark the success of the first five-year plan and the collectivization of agriculture. The CC 1st Plenary Session elected Joseph Stalin General Secretary of the Central Committee, and Lazar Kaganovich continued to serve as Stalin's deputy, an informal post referred to by Sovietologists as Second Secretary, and was empowered to manage party business and sign Politburo resolutions when Stalin was away from Moscow.