Sforno on Genesis 14:3/ספורנו על בראשית י״ד:ג׳

1כל אלה, all the ones just named, Amrafel and the two groups that conducted the war.

2חברו אל עמק השדים, gathered in that valley and arrived at a compromise concerning the dispute between them. From that time on, the five kings and their subjects served Kedorlaomer, paying him taxes for 12 years, after which they rebelled.