The battle screen, one of the action elements in the game, is different from the strategic map. Each player starts on opposite sides of the screen and controls an army consisting of infantry, cavalry and artillery. A standard army consists of six infantry, three cavalry and one cannon. Armies can be increased by up to three times their standard size by merging them together. Each team can only have six infantry, three cavalry and three cannons on the battlefield at one time. A human player can only control one class of units at any one time (although once the cavalry starts a charge, they can be left moving automatically forward in a straight line while the player focuses on either the cannon or infantry). A computer-controlled opponent can move all three classes of units at once, but their infantry and cavalry are not very aggressive. All units in the same class move and fire simultaneously. The infantry can move in any direction including backwards and have a short-range weapon.