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Carl von Clausewitz was born in 1780 in Burg, Kingdom of Prussia, in a middle-class family. Although not rich his family had claims to noble origins which eventually have been officially recognized. At 12 years old the boy entered Prussian army as a cadet in 34th Infantry Regiment. At age 13 he participated in his first military campaign fighting against revolutionary French forces; he was promoted to the rank of lieutenant at age 15.  He entered the Berlin War Academy at the age of 21, where his influential mentor General Gerhard von Scharnhorst was director.  Clausewitz studied history and philosophy – especially ideas of Immanuel Kant. After graduation in 1804 he became a military assistant (aide-de-camp) to Prussian Prince August. In the same year he met his future wife - a prominent Berlin’s socialite Marie von Brühl.  

Carl von Clausewitz was born in 1780 in Burg, Kingdom of Prussia, in a middle-class family. Although not rich his family had claims to noble origins which eventually have been officially recognized. At 12 years old the boy entered Prussian army as a cadet in 34th Infantry Regiment. At age 13 he participated in his first military campaign fighting against revolutionary French forces; he was promoted to the rank of lieutenant at age 15.  He entered the Berlin War Academy at the age of 21, where his influential mentor General Gerhard von Scharnhorst was director.  Clausewitz studied history and philosophy – especially ideas of Immanuel Kant. After graduation in 1804 he became a military assistant (aide-de-camp) to Prussian Prince August. In the same year he met his future wife - a prominent Berlin’s socialite Marie von Brühl.  

In 1806, he fought French invaders in the failed Jena Campaign. He was captured spent two years as a prisoner of war in France. After his return von Clausewitz was immediately appointed by his former mentor General von Scharnhorst as a military assistant to Prussian Army Chief of Staff. He worked with an exemplary dedication reorganizing and modernizing the Prussian Army. In year 1810, in recognition of his service he was appointed as a professor at the War Academy and assigned the prestigious task of military education of the Prussian Crown Prince.<ref>Parkinson, R., Clausewitz : a biography. 1st Cooper Square Press ed. 2002, New York: Cooper Square Press. 352 p.</ref><ref>Hahlweg, W., Carl von Clausewitz. 1957, Göttingen,: Musterschmidt-Verlag. 111 p.</ref><ref>Scholtz, G., et al., Carl von Clausewitz : Bildnis eines deutschen Soldaten. 1936, Berlin: Frundsberg-Verlag. 143, [1] p.</ref> Same year he married Marie von Brühl. Von Clausewitz spent the next two years advancing not only his military career but also advancing his scholarly studies, interacting with many prominent Berlin intellectuals.  

In 1806, he fought French invaders in the failed Jena Campaign. He was captured spent two years as a prisoner of war in France. After his return von Clausewitz was immediately appointed by his former mentor General von Scharnhorst as a military assistant to Prussian Army Chief of Staff. He worked with an exemplary dedication reorganizing and modernizing the Prussian Army. In year 1810, in recognition of his service he was appointed as a professor at the War Academy and assigned the prestigious task of military education of the Prussian Crown Prince. Von Clausewitz spent the next two years advancing not only his military career but also advancing his scholarly studies, interacting with many prominent Berlin intellectuals.  

As an honest and deeply patriotic man von Clausewitz profoundly resented French political and cultural domination of Prussia. His dissatisfaction culminated in the year 1812, when Prussia allied with Napoleon and Clausewitz defiantly refused to collaborate with France. He left Prussia to serve in the Russian Army.  However, before this forced exile von Clausewitz left the manuscript of his first major work "Principles of War" with the Prussian Crown Prince as a tutorial. He fought for Russia against Napoleon.  When Prussia switched to become an ally of Russia against Napoleon, he became Russian liaison officer with the headquarters of Prussian Field Marshal Blücher, and ultimately was appointed chief of staff of the German-Russian legion. In the decisive 1815 Waterloo campaign he served as a chief of staff to General von Thielmann's III Prussian Army Corps.  

Von Clausewitz profoundly resented French political and cultural domination of Prussia. His dissatisfaction culminated in the year 1812, when Prussia allied with Napoleon and Clausewitz defiantly refused to collaborate with France. He left Prussia to serve in the Russian Army.  However, before this forced exile von Clausewitz left the manuscript of his first major work "Principles of War" with the Prussian Crown Prince as a tutorial. He fought for Russia against Napoleon.  When Prussia switched to become an ally of Russia against Napoleon, he became Russian liaison officer with the headquarters of Prussian Field Marshal Blücher, and ultimately was appointed chief of staff of the German-Russian legion. In the decisive 1815 Waterloo campaign he served as a chief of staff to General von Thielmann's III Prussian Army Corps.  

Participation in the battles of Ligny and Wavre had a deep influence on von Clausewitz's understanding of the strategic Arcanum. In both those battles Prussian Army was greatly outnumbered and overwhelmed by French forces, and was eventually forced into the retreat. Nevertheless, those battles were hollow victories for French and major strategic victories for Prussians. Prussian Army was able to engage French forces long enough to prevent their entry into the Waterloo battlefield. This ultimately resulted in Napoleon’s defeat.

Participation in the battles of Ligny and Wavre had a deep influence on von Clausewitz's understanding of the strategic Arcanum. In both those battles Prussian Army was greatly outnumbered and overwhelmed by French forces, and was eventually forced into the retreat. Nevertheless, those battles were hollow victories for the French and major strategic victories for Prussians because they delayed Napoleon long enough to prevent reinforcements at Waterloo.

In 1818 von Clausewitz was promoted to Major-General and appointed as a director of the War College in Berlin. He remained at this prestigious post until year 1830 spending his time on research, teaching and writing his scholarly treatises. In 1830 he became Chief of Staff of the Prussian Army. This promotion coincided with an impromptu mobilization of Prussian forces which were rushed to the eastern borders of the Prussian Kingdom. The hasty mobilization and sealing-off Prussian borders was done in an anticipation of possible outbreak of violence - related to a turbulent political situation in the Russian Empire. While staying with his troops von Clausewitz contracted cholera and died in the city of Breslau on November 16, 1831. He was buried in his native city of Burg.  

In 1818 von Clausewitz was promoted to Major-General and appointed as a director of the War College in Berlin. He remained at this prestigious post until year 1830 spending his time on research, teaching and writing his scholarly treatises. In 1830 he became Chief of Staff of the Prussian Army. This promotion coincided with an impromptu mobilization of Prussian forces which were rushed to the eastern borders of the Prussian Kingdom. The hasty mobilization and sealing-off Prussian borders was done in an anticipation of possible outbreak of violence - related to a turbulent political situation in the Russian Empire. While staying with his troops von Clausewitz contracted cholera and died in the city of Breslau on November 16, 1831. He was buried in his native city of Burg.

== Importance of ideas of von Clausewitz ==

== Importance of ideas of von Clausewitz ==