Moses
Numbers 21:33ESV·traditional attribution

Then they turned and went up by the way to Bashan. And Og the king of Bashan came out against them, he and all his people, to battle at Edrei.

John Calvin Reformed @genevareformer

33. And they turned and went up. Here there is another victory of the people described, wherein they again experienced the continued favor of God, in order that they may be aroused to greater alacrity, and courageously prepare themselves for farther progress; for they might confidently expect that, with God for their leader, all things would succeed prosperously with them.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the victories obtained by Israel over Sihon and Og, which must be distinctly considered, not only because they are here distinctly related, but because long afterwards the memorial of them is distinctly celebrated, and they are severally assigned as instances of everlasting mercy.

Commenting on Numbers 21:21-35

Jamieson-Fausset-Brown Reformed @jfbcommentary

they turned and went up by the way of Bashan--a name given to that district from the richness of the soil--now Batanea or El-Bottein--a hilly region east of the Jordan lying between the mountains of Hermon on the north and those of Gilead on the south. Og--a giant, an Amoritish prince, who, having opposed the progress of the Israelites, was defeated.