A tetrarchia was a unit of four files in addition to a tetrarchès or tetrarch was a commander of 4 documents; a dilochia was a double file as well as a dilochitès was a double-file leader; a lochos was a single file in addition to a lochagos was a file leader; a dimoiria was a fifty percent file plus a dimoirites was a 50 %-file chief. A differen