Cavalry

Cavalry (from the Langoustinian cavalerie, itself derived from Imperic "cheval" meaning "horse") are soldiers who fight mounted on horseback.

Cavalry have the advantage of increased mobility, and a soldier fighting from horseback also has the advantages of greater height and speed over an opponent on foot. They are also scary and cavalry charges are glorious, making them good shock troops.

Cavalry are the most mobile of the combat arms, operating as light cavalry in the roles of reconnaissance, screening, and skirmishing in many armies, or as heavy cavalry for decisive shock attacks in other armies.

The term cavalry is sometimes used of dragoons, which is incorrect as dragoons are mounted infantry who use horses for mobility but dismount to fight.

https://en.wikipedia.org/wiki/Cavalry