What does Daniel 11:6 mean?

After some years, they’ll try to make peace by having the king of the south’s daughter marry the king of the north. But it won’t last—she, her child, and her supporters will all be betrayed. She’ll be handed over, along with those who brought her and supported her. Daniel 11:6 - Modern Text Bible

(A political marriage is arranged to create peace, but it fails, and everyone involved is betrayed.)