For solo players, Empire Earth offers a wealth of content in its main campaigns. You can lead a Greek civilization through ancient wars, guide the English from the Norman Conquest to the defeat of Napoleon, command the Germans through World Wars I and II, or follow a fictional future scenario involving Russia and time travel. The expansion added three more, including a Roman campaign and a Pacific WWII theater. A detailed learning campaign is also included to teach new players the game's many systems.
Boosting the hit points or attack range of structures and units. empire earth 1 gameplay