 Clausewitz's acceptance of the struggle for power as the essence of international politics must have impressed Lenin as starkly realistic.Clausewitz directly influenced Mao Zedong, who read "On War" in 1938 and organised a seminar on Clausewitz for the Party leadership in Yan'an.Thus the "Clausewitzian" content in many of Mao's writings is not merely a regurgitation of Lenin but reflects Mao's study.