The Russian Revolution of 1917 concluded in the fall with the October Revolution, organized and achieved through the direction of V. I. Lenin's radical Bolshevik faction of the Russian Social Democratic Labor Party. With the country already decimated and disorganized by three brutal years of the First World War, the fledgling socialist state struggled to hang on and survive civil war, a multinational foreign military intervention, and the collapse of the economy, including the broad depopulation of major cities and the onset of hyperinflation.