Konstantin Alexander Karl Wilhelm Christoph Graf von Benckendorff (, Alexander Khristoforovich Benkendorf, – ) was a Baltic German Cavalry General and statesman, Adjutant General of Tsar Alexander I, a commander of partisan (Kossak irregular) units during the War of 1812–13. However, he is most frequently remembered for his later role, under Tsar Nicholas I, as the founding head of the Gendarmes and the Secret Police in Imperial Russia. Family and career Alexander von Benckendorff was born into the Baltic German noble Benckendorff family in Reval (Tallinn in present-day Estonia), son of General Baron (12 January 1749, Friedrichsham – 10 June 1823, Kolga), who served as the military governor of Livonia, and of his wife Baroness Anna Juliane Charlotte Schilling von Canstatt (31 July 1744, Thalheim – 11 March 1797, Riga), who held a high position at the Romanov court as senior lady-in-waiting and best friend of Empress Maria Fyodorovna (the second wife of the Emperor Paul). His paternal grandparents were Johann Michael von Benckendorff and his wife Sophie von Löwenstern. Alexander von Benckendorff's younger brother Konstantin von Benckendorff (1785–1828) became a general and diplomat, and his sister Dorothea von Lieven (1785–1857) a socialite and political force in London and Paris. His other sister, Maria von Benckendorff (1784–1841), married Ivan Georgievitch Sevitsch. Having received his education at a Jesuit boarding school, Benckendorff started military service in 1798 in the Semyonovsky Life-Guards Regiment. During Napoleon's invasion of Russia in 1812, Benckendorff led the Velizh offensive, taking three French generals prisoner. When Moscow was liberated (October 1812), he became the commander of its garrison. In the foreign campaigns following, he defeated a French contingent at Tempelberg and became one of the first Russians to enter Berlin. He further distinguished himself at Leipzig (October 1813) and later cleared out the French forces occupying the Netherlands. After British and Prussian forces arrived to succeed him, his unit proceeded to take Louvain and Mechelen, liberating 600 imprisoned Englishmen on the way. In 1821 he attempted to warn Emperor Alexander I of the threat from the Decembrist clandestine organisation, but the Tsar ignored his note. After the 1825 Decembrist Revolt he sat on the investigation committee and lobbied for the establishment of a Corps of Gendarmes and of a secret police, the Third Section of the Imperial Chancellery. He served as the first Chief of Gendarmes and executive director of the Third Section from 1826 to 1844.