Having a march getting stuck can be very annoying. You can contact our support via the game with the following information and they will be happy to assist you:
1. Player name, ID and realm
2. When the march got stuck
3. Which troops were on the March
4. Did you try the standard fixes: Clear cache, repair files, restart the app and reset of the internet connection?
This information will help our CS staff and the developers to solve your problem in the best possible way.