A unit
The army of ancient Persia consisted of manageable military groupings under the individual commands. Starting at the bottom, a unit of 10 was called a "dathabam" and was led by a "dathapatis". A unit of 100 men was a "satabam" led by a "satapatis". A unit of 1,000 was a "hazarabam" and was commanded by a "hazarapatis". A unit of 10,000 was a "baivarabam" and was commanded by a "baivarapatis". The Greeks called such masses of troops a "myrias" or "myriad". Among mounted troops, an "asabam" was a cavalry unit led by an "asapatis".