Joshua 8:10 Early the next morning Joshua mustered his army, and he and the leaders of Israel marched before them to Ai. 11 The entire force that was with him marched up and approached the city and arrived in front of it. They set up camp north of Ai, with the valley between them and the city. 12 Joshua had taken about five thousand men and set them in ambush between Bethel and Ai, to the west of the city. 13 So the soldiers took up their positions—with the main camp to the north of the city and the ambush to the west of it. That night Joshua went into the valley.

14 When the king of Ai saw this, he and all the men of the city hurried out early in the morning to meet Israel in battle at a certain place overlooking the Arabah. But he did not know that an ambush had been set against him behind the city. 15 Joshua and all Israel let themselves be driven back before them, and they fled toward the wilderness. 16 All the men of Ai were called to pursue them, and they pursued Joshua and were lured away from the city. 17 Not a man remained in Ai or Bethel who did not go after Israel. They left the city open and went in pursuit of Israel.

18 Then the Lord said to Joshua, “Hold out toward Ai the javelin that is in your hand, for into your hand I will deliver the city.” So Joshua held out toward the city the javelin that was in his hand. 19 As soon as he did this, the men in the ambush rose quickly from their position and rushed forward. They entered the city and captured it and quickly set it on fire.


This is from the blueletterbible.org site.

Joshua was especially near his people during this crucial time of trying to regain victory. The people needed to know he was near, and they needed to follow his leadership.

If Israel will regain victory, they must take the offensive. They don't wait for Ai to bring the battle to them, bring the battle to Ai.

The men of Ai tried the exact same strategy against Israel as before. Generally, Satan will stick with a strategy against us until it doesn't work any more.

The plan is set.... Joshua Had to hold out his javelin.... Moses, had to hold his staff up during the battle. [Exodus 17:6-18] It seems that's a thing.