500 B
500 B
tribes of the nation of Israel
The descendants of each of Jacob's twelve sons had become a "tribe" or very large family group in the nation of Israel. Everyone in Israel belonged to one of the twelve tribes.
rebelled against Rehoboam
That is, "refused to follow Rehoboam as their king." It might help to start this sentence with, "So" or, "Because of that" or, "Because of what Rehoboam said."
remained faithful to him
That is, "stayed loyal to him" or, "continued to support him as king."