Heino Heinrich Graf von Flemming
Flemming was born in Martenthin into an old noble Brandenburg family that probably emigrated from the Netherlands. After a comprehensive education at German universities, Flemming fought the Ottoman Turks as a Colonel of Auxiliary Troops in the service of Brandenburg. Frederick William, Elector of Brandenburg, sent him to the King of Poland in 1672. After serving William of Orange excellently several times, Flemming eventually came to serve in the Brandenburg army, although in times of peace he served in other armies. Because of his ability and bravery he received many offers to change services, and in 1682 became a Feldmarschallleutnant (roughly the equivalent of a two-star general) in the Saxon army. Commanding Saxon auxiliary troops, he contributed to the delaying of the Turks before Vienna in 1683.
On 15 February 1684 he became commander of Saxon troops and became a Field Marshal after the death of Baron von der Goltz on 8 September 1688.
In this and the following year he commanded the Saxon troops on the Rhine under Elector John George III. However, he was suspended for multiple personal offenses, which hurt him deeply. The Austrian generals accused him of corruption. He left the Saxon army and became a marshal with the Brandenburg army, one of four field marhals who did so (the other three being John George II, Prince of Anhalt-Dessau, Derfflinger, and Spaen). Flemming commanded successfully in Flanders and retired in 1698 for health reasons.
Regarding personal names: Reichsgraf was a title, translated as Count of the Empire, not a first or middle name. Before 1919 preceding the first name, former titles are with people alive after 1919 dependent parts of the surname, thus preceding the main surname and not to be translated. The feminine form is Reichsgräfin. Titles using the prefix Reichs- were those created before the fall of the Holy Roman Empire.