Still a peasant herding exercise at its core. Empire Earth is an ambitious design, but only because it has so much stuff in it. There are fourteen eras, each the equivalent of an age in Age of Empires, ranging from prehistory to the hypothetical future. Each epoch has unique artwork and units. There are infantry, dogs, cavalry, archers, siege engines, ships, and eventually aircraft, tanks, and artillery, all in varying flavors appropriate to the epoch.