This message expands on one event that will take place at the end of the invasion (cf. v. 4).
39:17-18 The Lord also instructed Ezekiel to prophesy to the birds and beasts to come and feast on the flesh of the invaders who had died (cf. v. 4; Isa. 34:6; Jer. 46:10; Zeph. 1:7-8; Rev. 19:17-21). It would be like eating a great sacrifice for them, but those offered as sacrifices to the Lord would be great people of the earth rather than fat rams, lambs, goats, and bulls. Bashan, to the east of the Jordan River, consistently produced fat cattle because there was so much good pasture there.
39:19-20 These animals would be able to gorge themselves on the sacrifice that God would prepare for them. They would be able to eat the flesh of horses, chariot drivers, commanders, and soldiers. Normally people offered animals as sacrifices, but God would turn the tables and sacrifice people for the animals showing how little He regarded these enemies of Israel.
39:21-22 God's judgment of Gog would glorify Him greatly in the eyes of the rest of the world. Israel too would learn in a fresh way that He was their God (cf. the Exodus).
39:23-24 Then the nations would understand that it was not out of weakness that Yahweh permitted the Israelites to go into exile and die but because He was punishing them for their sins. That is why they had suffered as they had and the Lord had not responded to their cries for deliverance.