In every battlefield where there is either a river or canyon, there is a narrow, indestructible passage across. The cannons are long-range weapons, but aiming – or rather determining the exact range – is not always easy. Care has to be taken when firing cannons to avoid friendly fire. A battle usually is a deathmatch, although a player may retreat. If the attacking army retreats, they will return to the state that were in at the beginning of that turn. If the defending army decides to retreat, they will move to an adjacent state that is still under their control, surrendering that state the battle was on to their enemy. The defenders can not retreat if there are no adjacent states that they own. Retreating will result in the loss of any cannons that the army has. The army of the computer-controlled opponent will retreat if all of its cannons have been destroyed and its enemy has more than three times the units than it has.