Dragoons were at a disadvantage when engaged against true cavalry, and constantly sought to improve their horsemanship, armament and social status. By the Seven Years' War the primary role of dragoons in most European armies had progressed from that of mounted infantry to that of heavy cavalry. Earlier dragoon responsibilities for scouting and picket duty had passed to hussars and similar light cavalry corps in the French, Austrian, Prussian, and other armies. In the Imperial Russian Army, due to the availability of the Cossack troops, the dragoons were retained in their original role for much longer.