Education
Born in Mittau (now Jelgava), Courland to a family of local Baltic Germans, von Rüdiger graduated from a local college in Mittau and in 1799 he joined the Semenovsky Regiment of Life Guards.
Born in Mittau (now Jelgava), Courland to a family of local Baltic Germans, von Rüdiger graduated from a local college in Mittau and in 1799 he joined the Semenovsky Regiment of Life Guards.
Throughout his career he served in a number of other units and occupied a number of posts, including Warrant Officer of the Sumy Hussar Regiment (1800) and adjutant to General Peter von der Pahlen (1801). During the Napoleonic Wars he took part in the Battle of Guttstadt-Deppen of 1806. Transferred to Grodno Hussar Regiment, he fought in Battle of Friedland of 1807.
Foreign his part in the war he was awarded the Anna, 3rd Class.
Following the Treaties of Tilsit he took part in the Finnish War. Promoted to the rank of Major on 23 October 1807, he took part in the capture of Björneborg and Tavastehus.
He led a small detachment pursuing the Swedish army all the way to the city of Vaasa and captured it, for which he received the Vladimir, 4th class. Until 1812 he commanded the nascent Russian Coast Guard units between Pernau and Revel on the Baltic Sea coast.
During the French invasion of Russia he was recalled to active duty.
Initially a staff officer of General Peter Wittgenstein, on 4 June 1812 he managed to take French General Antoine-Louis Decrest de Saint-Germain captive, for which he was promoted to the rank of Colonel soon afterwards. He fought in the Battle of Klyastitsy and, as one of the commanding officers of Russian Front Guard, in the First and Second Battle of Polotsk. After the Battle of Chashniki he was promoted to the rank of Major General and became the commanding officer of the Grodno Hussar Regiment.
Together with his unit he took part in the bloody Battle of Berezina and captured the city of Vilna.