Moses
Genesis 14:14ESV·traditional attribution

When Abram heard that his kinsman had been taken captive, he led forth his trained men, born in his house, 318 of them, and went in pursuit as far as Dan.

John Calvin Reformed @genevareformer

14. When Abram heard that his brother was taken captive . Moses briefly explains the cause of the war which was undertaken; namely, that Abram might rescue his relation from captivity. Meanwhile, what I have before said is to be remembered, that he did not rashly fly to arms; but took them as from the hand of God, who had constituted him lord of that land.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the only military action we ever find Abram engaged in, and this he was prompted to, not by his avarice or ambition, but purely by a principle of charity; it was not to enrich himself, but to help his friend. Never was any military expedition undertaken, prosecuted, and finished, more honourably than this of Abram's. Here we have, I.

Commenting on Genesis 14:13-16

John Gill Reformed Baptist @doctorgill

And when Abram heard that his brother was taken captive,.... That is, his brother's son Lot, as in Gen 14:12; which was contrary to the law of nations; since Lot was only a sojourner, and not an inhabitant n Sodom, and therefore had no concern in the quarrel between the kings, and this justified Abram's taking up arms on his behalf: he armed his trained...