What does Jeremiah 51:58 mean?

This is what the Lord of all creation says: Babylon’s massive walls will be torn down, and her huge gates burned. All the work people did for nothing—the nations wore themselves out just to feed the fire. Jeremiah 51:58 - Modern Text Bible

(Babylon’s impressive defenses will be destroyed, and all the effort put into building them will be wasted. The city’s fall is certain and complete.)