https://www.btstories.com/israel-in-captivity/

Israel had been a separate kingdom from Judah for many years. Their first king set up two golden calves for worship. None of their kings destroyed the calves, and none of them followed the Lord. Some of the greatest prophets who ever lived were sent to Israel. Still, the people refused to turn to God.

So, after many warnings, God finally allowed them to be conquered. They were taken off the land and made to live in other cities.