@Furt: Yes, units can move without a leader. For a leader in the unit you get a bonus in shooting and close combat. The import thing is, you need a leader to get the special characteristics like “Formed” and “Fighter”. If your leader is killed, the unit will lose this characteristic.
@Dr. The Viking: Yes, I changed the shooting effect and I changed the phases of the turn. There is no special movement and shooting phase anymore. Instead there are two Action phases. With this chance it is now possible to shoot and attack or to react to the movement / action of the enemy.