To turn a unit all the models remain in place, but are turned round through 90 or 180° to face their side or rear. To make a turn a unit must surrender a quarter of its move - a unit with a move of 4" must give up 1' to turn for example.
When a unit turns to face its side or rear, the unit's leader is automatically rearranged into the front rank together with the standard bearer, musician and any characters included in the unit. If there is insufficient space in the ranks, models may be rearranged into the rear ranks as the player wishes.