In January 1912, the majority of the Bolshevik faction, led by Lenin, as well as a few defecting Mensheviks, held a conference in Prague and decided to break away from the Russian Social Democratic Labour Party, and formed a new party, the Russian Social Democratic Labour Party (Bolsheviks). In response, Trotsky organized a "unification" conference of social democratic factions in Vienna in August 1912 (a.k.a. "The August Bloc") and tried to re-unite the Bolsheviks and Mensheviks into one party. The attempt was generally unsuccessful.