 Complete the following phrase:  Evgraf Davydov was born to a noble Russian family in the Tula Governorate. On 9 September 1791, at the age of 16, he became a watch-master  in the Life Guard Horse Regiment. Several years later, in 1798, he was transferred as a cornet to the Life Guard Hussar Regiment. On 12 April 1803, Davydov was promoted to the rank of colonel polkovnik, and in 1805 he fought at the Battle of Austerlitz. Two years later, during the War of the Fourth Coalition, Davydov fought at the battles of Guttstadt-Deppen, Heislberg, and Friedland. During Napoleons invasion of Russia, Davydov served in the 2nd Brigade of the Guard Cavalry Division of the 1st Reserve Cavalry corps in the First Western Army according to Prof. Alexander Mikaberidze. At the 