Cavalry

n.

1.

(Mil.) That part of military force which serves on horseback.

Noun	1.	cavalry - troops trained to fight on horseback; "500 horse led the attack" Synonyms: horse cavalry, horse
	2.	cavalry - a highly mobile army unit

armed forces, armed services, cavalryman, horse, horse cavalry, military, military machine, military personnel, soldiery, trooper, troops, war machine