Indeed, BoB2 is not just strategic. One can easily join a squadron, and participate in just that squadron's exploits. The campaign will follow historical events, but it's dynamic, so hugely reliant on the battle going on around. I personally have never had a better sim experience, and last summer, a few of us on simHQ did a day-by-day historical recreation of the BoB by posting daily AR's. It was interesting to compare eachother's, and they're well worth a read over there, as there are some awesome story lines which went on or (in my case) fizzled out...
