What are commanders?
The 1980 U.S. rules offer a variation that simulates the influence of commanders, or great generals being at a particular battle. Once per turn, each player may change one of the dice he rolled to a six. Thus a roll of 1, 2, and 3 may become a roll of 6, 2, and 3. The rules are clear in stating that this may only be performed by an attacking army.