 Complete the following phrase:  He was born in Kötzlin, Altmark. After serving as a page on the court of Prince Frederick Ulrich of Wolfenbüttel, he entered Imperial military service in 1620. After the dissolution of Wallensteins troops and Gustavus Adolphus intervention, Königsmarck offered his services to the Swedish King. By 1635 he commanded his own regiment. He was appointed major general in 1640, governor general of Bremen-Verden in 1645, Privy Councilor in 1651 and field marshal in 1655. He is best known for the 