Moses
Genesis 14:7ESV·traditional attribution

Then they turned back and came to En-mishpat (that is, Kadesh) and defeated all the country of the Amalekites, and also the Amorites who were dwelling in Hazazon-tamar.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the first war that ever we read of in scripture, which (though the wars of the nations make the greatest figure in history) we should not have had the history of if Abram and Lot had not been concerned in it. Now, concerning this war, we may observe, I. The parties engaged in it.

Commenting on Genesis 14:1-12

John Gill Reformed Baptist @doctorgill

And they returned, and came to Enmishpat, which is Kadesh,.... Pursuing their victories as far as Elparan by the wilderness, they had passed by the country of the Amalekites; wherefore they "returned", or came back to fall upon them, and they came to a place called Enmishpat, or the "fountain of judgment"; which was not its future name, as Jarchi thinks, because there Moses and...

Adam Clarke Methodist @methodicalclarke

En-mishpat - The well of judgment; probably so called from the judgment pronounced by God on Moses and Aaron for their rebellion at that place; Num 20:1-10. Amalekites - So called afterwards, from Amalek, son of Esau; Gen 36:12. Hazezon-tamar - Called, in the Chaldee, Engaddi; a city in the land of Canaan, which fell to the lot of Judah; Jos 15:62. See also Ch2 20:2.