I fought a custom battle with one unit phalangitai deuteroi and one unit of germanic pikemen. Halfway through the battle, the middle to the last rows started drifting backwards. The front two rows were still left fighting. In order to keep the whole unit together to fight the pikemen, I had to march through them. this happened before with some reformed pikemen. I've heard of a phalanx that drifts to the right, but not backwards.Is there a reason why they do this?
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