Having a march disappear can be very annoying. If this issue occurs, you can contact our support team via the game with the following information and they will be happy to assist you:
1. UserID + WorldID
2. When did the march disappear?
3. Which troops were on this march? And how many were there?
4. Did you try standard fixes like: Clearing the cache, repairing files, reinstalling the app, restarting the app, and resetting of the internet connection?
This information can help our support team and the developers to solve your problem in the best possible way.