A body or line of troops in battle array, whether composing an entire army, or one of its main divisions; = battalion, n. archaic (since 1700).

The left side of an army or of a naval fleet in battle (as viewed from the rear). Also in extended use.

Military. The right side of an army or of a naval fleet in battle (as viewed from the rear). Also in extended use.

= partiment, n.

A constituent part or element; spec. a company or division of an army.

gen. A large body of men in battle array; one of the large divisions of an army.

Military and Nautical. A portion of an army or fleet, consisting of a definite number of troops or vessels, under one commanding officer; also…

A large body of men in battle array, a marshalled force or host, whether constituting the whole of an army, or one of its great divisions or…

A division of an army in battle array. Cf. battle, n. 8. Obsolete.

a number of soldiers acting together as an organized group.

Military. A relatively small division of troops which may be deployed independently of the army or larger body to which it belongs.

an airborne division of a land army or naval force; cf. Fleet Air Arm at fleet, n.1 1d.

(a) a force equal and opposite to a force giving rise to it; cf. sense 2b; (b) Military a military unit kept in a state of readiness for rapid…