Contradiction with Joshua 13:1
Joshua 12:19 lists kings defeated by Israel, suggesting complete conquest. However, Joshua 13:1 states there remains very much land to be possessed, indicating the conquest was incomplete.
Joshua 13:1: Now Joshua was old [and] stricken in years; and the LORD said unto him, Thou art old [and] stricken in years, and there remaineth yet very much land to be possessed. [to...: Heb. to possess it]
Contradiction with Judges 1:27
Joshua 12:19 mentions the defeat of Taanach, but Judges 1:27 states that the Israelites did not drive out the inhabitants of Taanach fully, suggesting a contradiction in the outcome.
Judges 1:27: Neither did Manasseh drive out [the inhabitants of] Bethshean and her towns, nor Taanach and her towns, nor the inhabitants of Dor and her towns, nor the inhabitants of Ibleam and her towns, nor the inhabitants of Megiddo and her towns: but the Canaanites would dwell in that land.
Contradiction with Judges 1:33
Joshua 12:19 implies full victory over kings, including in areas like Dor. However, Judges 1:33 states that the tribe of Naphtali did not drive out the inhabitants of Dor.
Judges 1:33: Neither did Naphtali drive out the inhabitants of Bethshemesh, nor the inhabitants of Bethanath; but he dwelt among the Canaanites, the inhabitants of the land: nevertheless the inhabitants of Bethshemesh and of Bethanath became tributaries unto them.