Prussian general and writer, 1780-1831, author of Vom Kriege and other works
Fishburn and Hughes: "A German military historian whose theories on military strategy were highly influential, especially in the Prussian army. Clausewitz entered the Tsar's service in 1812 when Napoleon invaded Russia, and distinguished himself both for his courage and for the advice he gave the Russians on the retreat from Moscow which led to the defeat of the French. Most of the military theories expounded in his book On War (which appeared in English in 1873) are based on the campaigns of Frederick the Great and Napoleon. 'War is nothing but the continuation of political intercourse with the admixture of different means.'" (48).