Lenin: The Assessment of the Russian Revolution https://www.marxists.org/archive/lenin/works/1908/apr/00.htm
Lenin - On Socialism in One Country https://marxistleninists.org/Reading%20Guide/Socialism%20in%20one%20country/index.htm
The Peasant War in Germany by Frederick Engels http://hiaw.org/defcon6/works/1850/peasant-war-germany/index.html