horsemen

Definition:

In Bible times, the term "horsemen" referred to men who rode horses into battle.

Warriors who rode in horse-pulled chariots may also have been called "horsemen," though this term usually refers to men who were actually riding on horses.
The Israelites believed that using horses in battle placed too much emphasis on their own strength rather than on Yahweh, so they did not have many horsemen.
This term could also be translated as "horse riders" or "men on horses."