John Peterson explains the basic features of imperialism, based on Lenin's analysis, with up-to-date facts and figures from the development of American imperialism in particular.
This volume also includes a "Marxist Primer on Imperialist War," drawing on Lenin and Trotsky's principled analysis of this specific aspect of the question. Finally, "When US Imperialism Invaded Soviet Russia" tells the story of the US invasion of Soviet Russia in 1918 under Woodrow Wilson, which ended with the mutiny of the US troops.