What does Joel 2:20 mean?

'I’ll drive the northern army far away—into a dry, empty land. Their front lines will end up in the eastern sea, and the rear guard in the western sea. The stench of their dead will rise up, because they did terrible things.' Joel 2:20 - Modern Text Bible

(God will remove the threat and judge those who brought destruction, making it clear that evil won’t win in the end.)