Reiter
Reiter or Schwarze Reiter ("black riders", anglicized swart reiters) were a type of cavalry in 16th to 17th century Central Europe including Holy Roman Empire, Polish–Lithuanian Commonwealth, Tsardom of Russia, and others. Contemporary to the cuirassier and lancer cavalry, they used smaller horses, for which reason they were also known as Ringerpferde (corresponding to the French Argoulets).