This chapter breaks out of the family tent into real geopolitics — named kings, a specific coalition, a documented campaign — and John Lennox, who's spent a career arguing that biblical faith is trust grounded in history rather than a leap in the dark, points to exactly this kind of textured, checkable detail as part of the case that Genesis is remembering something rather than inventing it. Abram arms three hundred and eighteen trained men, routs the coalition that captured Lot, and recovers him.
Then two kings meet him in the same valley, and the contrast between them is the theological center of the chapter. The king of Sodom offers a transaction — keep the goods, give me the people. Melchizedek, king of Salem and priest of God Most High, brings out bread and wine instead, blesses Abram, and receives a tithe from him. This is where it's worth stopping to cross-reference forward, because this obscure figure — no genealogy given, no birth or death recorded — becomes enormously important later. Psalm 110 makes him the template for a coming king-priest. And the writer of Hebrews, in chapters five through seven, builds an entire argument on the silence of this text: because Levi (still in Abraham's loins at this point) effectively pays tithes to Melchizedek through Abraham, the Melchizedek priesthood is shown to be senior to the Levitical one — which is exactly the argument Hebrews needs to establish that Christ's priesthood supersedes Aaron's. You don't need to know Hebrews to read Genesis fourteen, but once you do know it, this chapter never reads the same way again.