Genesis 14:7-9 meaning

The Kings from the east followed the entire length of the "Kings Highway" (Numbers 20:17, 21:22) that ran in a straight line through the hill country east of the Jordan from north to south. They traveled behind the mountains emerging south of the Jordan Valley  at El-paran (e.g., Elath on the Gulf of Aqabah, the northern tip of the Red Sea). At this time, the invaders are about 100 miles south of the Dead Sea. Then they turned back and came to En-mishpat (v 6).  The invaders were heading to the northwest, so they can attack from the west, which would be an unexpected direction for an invading army. En-mishpat is another name for Kadesh. It means "spring of judgment or justice." Kadesh is located west of Elath in the southwest Negev (e.g., north Sinai/southern Israel) and was later called "Kadesh Barnea" (Numbers 13:26, 20:16, 32:8).

Continuing their practice, they marched along defeating cities along the way. In the sixth and final battle, Chedorlaomer defeated the Amalekites. The Amalekites were desert people and a notorious enemy of Israel (Exodus 17:8-16; Deuteronomy 25:17; 1 Samuel 15:2). The origin of the Amalekites is traced to Amalek, son of Eliphaz and grandson of Esau (Genesis 36:11-12; 1 Chronicles 1:36).

The Amorites, who lived in Hazazon-tamar (v 7) were the sixth and last people conquered by the Eastern Kings in route to the plains of Sodom. Hazazon-tamar is midway on the western shore of the dead sea, an oasis in the wilderness of Judah (Joshua 15:62).

Although there is not an account of the fight itself, the five Kings of the Jordan Valley fail to repel the alliance of the eastern four Kings - Four kings against five (v 9). Consequently, the cities of Sodom and Gomorrah are plundered. The four-member confederation of eastern kings were willing to endure this extreme effort requiring the Jordan Valley cities to resume paying their tribute. This is likely due to the lushness of the area, meaning they had substantial wealth to be taxed. This material wealth was also observed by Lot.