Under Gods Command
Joshua 8:3: So Joshua and the whole army moved out to attack Ai, He chose thirty thousand of his best fighting men and sent them out at night.
The conquest of Ai was very important to the Israelites. Only 11 miles away from Jericho, Ai was a key stronghold for the Canaanites and a buffer fortress for Bethel (8:12). If the Canaanite Kings got wind of an Israelite defeat at Ai, they could unite in a coordinated attack. They did not know that God had restored his power and protection to Joshua’s troops. We must depend on God with absolute obedience to be sure of the victory he has promised.
Under Gods command 