one who is eager for the fray, a ‘brave’.

A dog trained for use in war (formerly, to attack the foe; latterly, for carrying messages, sentry-work, etc.). Also figurative, a fierce warrior…

U.S. One whose voice is for war. Cf. war-dog, n., war-hawk.

One who traffics in war. Contemptuously applied to. one who seeks to bring about war.

One who levies (in senses of the verb).

a reckless militarist; one who threatens violent action.

a participant in or advocate of open warfare (against a particular adversary); cf. hot war n. (b), cold warrior n. at cold, adj. compounds 4.