Fight the Battle of Gettysburg as Robert E. Lee commanding the Army of Northern Virginia, or as George G. Meade commanding the Army of the Potomac in an ultra-realistic, historically accurate real time strategy game. Gettysburg includes a real GIS capability map including terrain data. The game engine's artificial intelligence includes ultra-realistic tactics that take into account the opposing unit's position, active troops, overall strength, fatigue, supply, morale, and the unit commander's command and control abilities, and will play a historically accurate opposition. Will your tactics and strategy on the battlefield alter the outcome of the battle? Can the Army of Northern Virginia prevail?