Friedrich Leopold Graf von Gessler (or Geßler; (24 June 1688 – 22 August 1762) was a Prussian Generalfeldmarschall and one of Frederick the Great's most famous cavalry generals. Gessler was born in Schwarzenau in the Duchy of Prussia. He entered an infantry regiment in Königsberg in 1703, becoming a cadet on 6 June. He fought under Leopold I, Prince of Anhalt-Dessau, in the War of the Spanish Succession. After ten years of service for the Holy Roman Emperors, Gessler returned to the Prussian Army in 1713 as Rittmeister in the Regiment Pannwitz zu Pferde.