Your Units returned to your Catacombs because one of the following situations occurred while your Units were on the way to Hamlet:
- The Hamlet disappeared from the Map as no one сaptured or attacked it for more than 24 hours;
- The Hamlet ran out of Resources;
- The Hamlet was captured by a member of your League;
- The Hamlet you were trying to attack or spy on became vacant.
In all these cases, your Units do not travel back to your Castle but are immediately sent to your Catacombs.