- Scenarios are large-scale battles that run a few times a year. Sometimes they are based on actual WWII battles, such as the Battle of Britain. Sometimes they are based on hypothetical battles that might have been. Each side has particular aircraft, mission objectives, squadron assignments, bases, and resources. A scenario typically runs over the course of a month, with one battle per week, each battle lasting 3-4 hours. If you ever wanted to be a real WWII pilot, this is about as close as you can get.