Who was expert horse riders who invaded India from the north?

The expert horse riders who invaded India from the north were primarily the Central Asian nomadic tribes, notably the Scythians and later the Huns. However, the most significant invasions were led by the Mongols under Genghis Khan in the 13th century, and later the Timurids under Tamerlane in the 14th century. These groups were known for their exceptional equestrian skills and military tactics, which allowed them to conquer vast territories, including parts of the Indian subcontinent.