This verse gives historical context: the five kings were vassals — subject peoples — under Chedorlaomer's rule. Their rebellion after twelve years is the trigger for the punishing campaign that follows. Chedorlaomer's response will be swift and brutal.
Memory phrase: Injustice eventually meets resistance.
Talk about it: The five kings obeyed for twelve years, then rebelled. Is there a difference between obeying because you must and obeying because it is right?
Prayer: God, help me stand up for what is right — and help me do it at the right time and in the right way.