legion
Numerous; vast; very great in number.
(military, Ancient Rome) The major unit or division of the Roman army, usually comprising 3000 to 6000 infantry soldiers and 100 to 200 cavalry troops.
(military) A combined arms major military unit featuring cavalry, infantry, and artillery.
(military) A large military or semi-military unit trained for combat; any military force; an army, regiment; an armed, organized and assembled militia.
A national organization or association of former servicemen.
A great number.
(dated, taxonomy) A group of orders inferior to a class; in scientific classification, a term occasionally used to express an assemblage of objects intermediate between an order and a class.
To form into legions.