The Northern Kingdom (or Israel) which commenced under the rule of Jereboam, is led by a succession of kings, twenty in all, spanning four different dynasties, none of whom love, follow or serve God. They serve other gods and lead the people far away from Him. Through the reign of these kings God sends prophets including ELIJAH, AMOS and HOSEA, warning them to turn away from their wickedness and turn back to Him or they will meet their destruction. They do not heed the warning, God reduces the size of the Northern Kingdom through a succession of lost battles and in 722BC the Assyrian army comes in, takes over the land and the people are sent into EXILE IN ASSYRIA. The Northern Kingdom/Israel is no more.
This diagram is from Gospel
and Kingdom: A Christian Interpretation of the Old Testament by Graeme
Goldsworthy, page 32. (Published by Paternoster Press in 1982)