Larry controlled the army to start moving forward. He didn't let them just charge ahead haphazardly. He was not a newbie in strategy games. He needed to make sure their units arrived together as one fighting force rather than had the faster-charging units arrive first just to be slaughtered.
The defensive force stayed near the wall as they looked at the enemies that slowly approached. Wicked Witches arranged their guild units in line formation along the wall. This formed a very long defensive line that covered the entire front side of the wall.
The players intermingled within this formation. Ranged players and units were positioned on the wall. Since the formation formed a long line, it was not very thick. But the thickness of the formation was just right to allow the ranged players on the wall to support the ones fighting at the front line.