II Chronicles 33 tells us about Manasseh's life.
His father, Hezekiah, had been King of Judah for twenty-nine years. Hezekiah had been a good, God-serving king!
Manasseh became king when he was twelve years old. That means he was born when his dad was forty-two years old. Although we have no details, Manasseh chose to rebel against his father's values - and therefore against God.
The Bible describes him as follows:
v.2 - ...it was an evil reign, for he encouraged his people to worship the idols of the heathen nations...
v.9 - ...Manasseh encouraged the people...to do even more evil than the nations the Lord destroyed when Israel entered the land.
But here's the critical line:
v.10 - Warnings from the Lord were ignored by both Manasseh and his people.
So:
v.11 - ...God sent the Assyrian armies, and they seized Manasseh with hooks and bound him with chains and carted him away to Babylon.