What does Ezekiel 29:18 mean?

Son of man, Nebuchadnezzar, the king of Babylon, made his army work hard against Tyre. Every soldier’s head was rubbed raw and their shoulders were worn out, but neither he nor his army got anything out of it for all that effort against Tyre. Ezekiel 29:18 - Modern Text Bible

(God points out that Nebuchadnezzar’s campaign against Tyre was exhausting and costly, but in the end, he and his army didn’t get the reward they expected.)