Amaziah chose to do things his own way, after having experienced the help of God. When a prophet was sent to him from the Lord to make him realize the absurdity of what he was doing, Amaziah made it plain that he had better keep quiet.
Uzziah and Jotham had worked to build cities in Judah, to equip the army, and to build war machines. All these things were impressive, but we see that even the best preparations, without God, are useless.
We have very little information concerning the reign of Jehoiachin; if we can call it a reign, for in fact Nebuchadnezzar besieged the city of Jerusalem. But the name of Jehoiachin comes up several times in the Word, being linked to several events.