David's son Solomon was able to rule over the whole of Palestine, but when his grandson Rehoboam came to the throne he vowed to rule more harshly. The northern tribes revolted and formed their own government under Jeroboam I in 922 B.C. After this time the northern kingdom was known as "Israel," with its capital located in Shechem, Tirzah, and finally Samaria. The southern kingdom was known as "Judah" which retained Jerusalem as its capital. The northern kingdom was conquered by the Assyrians in 722 B.C. and the southern kingdom was conquered by the Babylonians in 587 B.C.