Mounted Combat

A willing creature that is at least one size larger than you and that has compatible anatomy can serve as a mount. Mounting a creature overrides the No Sharing Spaces rule in Creature Size and Space.

Saddling Up: Once during your move, you can mount an adjacent creature or dismount. Doing so costs an amount of movement equal to half your movement speed. You can't choose to mount or dismount a creature if your movement speed is 0.

Controlling a Mount: A Beast that has been trained to accept a rider will usually act as you direct. A mounted combatant typically uses the Ready action to coordinate an attack on their mount's turn (see Keeping the Order Orderly).

Forced Movement: When the mount moves (willingly or otherwise), you are carried along with it. You are dismounted if you fall prone. You fall prone automatically if you move (willingly or otherwise) out of the mount's space without properly dismounting.