But everything after that is different. Battles are done on lanes (think Plants vs Zombies) and you place units or defend against attackers in these lanes. Every battle is then more predictable and tactical.
It's also more akin to an MMO with around 50,000 players per map. Each one of these players can form alliances or try to win on its own. The ultimate goal being the capture of Washington DC.
Visually, it looks a lot like Civilization, with colored borders defining the limits of your Empire.