Synonyms for Men-at-arms:

n.

•combatants (noun)
antagonists, rivals, Mercenaries, opponents, toughs, rioters, jousters, Bullies, thugs, pugilists, warriors, Enemies, fighters, Soldiers, competitors, strugglers, bruisers, foes, battlers, combatants, duelists, brawlers, contestants, Adversaries, militants, gladiators, assailants, quarrelers, Swordsmen.