Delegates to the 2nd World Congress of the Comintern in Moscow, 1920. Left to right: Giacinto Serrati, Leon Trotsky, Alfred Rosmer, Paul Levi, Grigory Zinoviev, Nikolai Bukharin, Mikhail Kalinin, Karl Radek.
Kliment Voroshilov, Semyon Budyonny, Mikhail Frunze and Nikolai Bukharin in Novomoskovsk 1921 with the 1st Cavalry Army (Konarmia)