Twelve. The No. of Government. See App-10.
served. had served, Genesis 14:4 goes back to the events leading up to the present war with Sodom.
thirteenth. The first occurance. Hence the number of Rebellion. See App-10.
Related Commentaries of Genesis 14:4
Genesis 14:4
4 Twelve years they served Chedorlaomer, and in the thirteenth year they rebelled.