Three days after they made the treaty with them, the Israelites found out they were from the local area and lived nearby. ¹ 

These kings came out with their armies; they were as numerous as the sand on the seashore and had a large number of horses and chariots. ¹ 

So the five Amorite kings (the kings of Jerusalem, Hebron, Jarmuth, Lachish, and Eglon) and all their troops gathered together and advanced. They deployed their troops and fought against Gibeon. ¹ 

As they fled from Israel on the slope leading down from ¹  Beth Horon, the Lord threw down on them large hailstones from the sky, ²  all the way to Azekah. They died – in fact, more died from the hailstones than the Israelites killed with the sword.