The Tribes of Judah and Simeon Fight the Canaanites

After the death of Joshua, the Israelites asked the Lord, “Which of our tribes should attack the Canaanites first?”

Israel Stops Worshiping the Lord

Joshua had been faithful to the Lord. And after Joshua sent the Israelites to take the land they had been promised, they remained faithful to the Lord until Joshua died at the age of 110. He was buried on his land in Timnath-Heres, in the hill country of Ephraim north of Mount Gaash. Even though Joshua was gone, the Israelites were faithful to the Lord during the lifetime of those men who had been leaders with Joshua and who had seen the wonderful things the Lord had done for Israel.

After a while the people of Joshua's generation died, and the next generation did not know the Lord or any of the things he had done for Israel.

so I'll stop helping them defeat their enemies. Israel still had a lot of enemies when Joshua died,

That's why the Lord had not let Joshua get rid of those enemy nations all at once.