This is a great WWII era game that allows one to participate in large battles with land forces (infantry, armor, trucks, anti-aircraft, etc.), air forces (fighters, bombers, etc.), and naval forces (river boats, destroyers, transports, etc.) controlled by 100s to 1000s of online players in a large theater of battle. You can even have multiple people control or ride a vehicle (e.g. bombers with pilot and tail gunner, tanks with driver and gunner, tanks/inf riding on transports for naval invasions, etc.).

The game is updated every few months with new features and bug fixes (yeah they have a few problems here and there).