Armies were Composed of Cavalry
Source: TTT
Exodus 14:9
The Egyptians—all Pharaoh’s horses and chariots, horsemen and troops—pursued the Israelites and overtook them as they camped by the sea near Pi-hahiroth, opposite Baal-zephon.
1 Kings 20:20
and each one struck down his opponent. So the Arameans fled, with the Israelites in pursuit. But Ben-hadad king of Aram escaped on horseback with the cavalry.