when Solomon's successor, Rehoboam, dealt tactlessly with economic complaints of the northern tribes, in about 930 BCE (there are differences of opinion as to the actual year:} ) the Kingdom of Israel and Judah split into two kingdoms: the northern Kingdom of Israel, which included the cities of Shechem and Samaria^^
after the death of King Solomon (sometime around 930 B.C.) the kingdom split into a northern kingdom, which retained the name Israel and a southern kingdom called Judah, so named after the tribe of Judah that dominated the kingdom. ......The last war they engaged in destroyed Israel but left Judah intact:)
Uh also the current nation of Israel is still largely made up of the original southern kingdom of Judah, while the tribes of the northern kingdom remain scattered: >
em... here are some random names :D Nine landed tribes formed the Northern Kingdom: the tribes of Reuben, Issachar, Zebulun, Dan, Naphtali, Gad, Asher, Ephraim, and Manasseh