Thats called the "phalanx bug". It was corrected in RTW 1.9 (Alex.exe). It's very annoying especially if you are playing phalanx based factions. There is no guaranteed way to prevent it, but grouping your phalanx units together and pressing Backspace often when phalanx is engaged usually helps to prevent it from happening. However for this to work your phalanxes must be with guard mode on, othervise ordering them to stop will cost you extra casualties.
Bookmarks