Military leader and politician (1583–1634) who offered his services during the Thirty Years' War, to the Holy Roman Emperor Ferdinand II. He became the supreme commander of the armies of the Habsburg Monarchy and a major figure of the Thirty Years' War. Rare ink signature on an off-white 2.75 x 2.5 irregular slip clipped from a larger letter or document. Signature is affixed to a 5.75 x 4 off-white sheet with collector’s notations to bottom and reverse. In very good condition, with irregular edges, a horizontal fold through a portion of signature, and scattered toning. RR Auction COA.