1. The people still had to fight (1-12; 20-63)
As he had promised, God defined the boundaries of Judah's land. It was extensive. They were in the land, but still, they had to drive out remnants of the pagan nations. If they did not obey the Lord's commands, then the pagan nations would remain and be like a thorn in their side. This happened at Jerusalem. Jerusalem was held by the Jebusites and was not conquered until the time of King David. (63; 2 Sam 5:9).
2. People who responded in faith (13-19)
Caleb's tribe claimed Hebron. Caleb inspired his army by offering his daughter Acsah in marriage to the one who defeated a city. Othniel conquered the city and claimed his bride. He later become Israel's first judge. Acsah also claimed what was hers. She had faith to ask Caleb for springs which her people needed. They were granted. God blesses those who actively claim their inheritance.