Units may also move from walls or a tower to the courtyard in a single Movement phase, and they may be placed in any formation normally allowed to them. Moving from the ramparts or from a tower into the courtyard costs half the movement of a unit. Measure any remaining movement from the base of the wall or tower. If there is insufficient room in the courtyard for all the models (because of enemy troops, for example), then any models that do not fit must be left on the ramparts or the tower. Note that no models may move from the ramparts to the courtyard if any models in the unit are engaged in close combat.