What does Jeremiah 51:15 mean?

Shout your battle cries against her from every side. She's surrendered; her defenses have fallen. Her walls are torn down. This is the Lord's payback for what she's done—take your revenge on her, do to her what she did to others. Jeremiah 51:15 - Modern Text Bible

(Babylon's defeat is total. God is making sure she receives the same treatment she gave to others.)