Kind of like a WWII MMO version of ARMA, planes are nice, systems are not quite as detailed as dedicated aircombat sims(mixture is auto,cowl/radiator flaps model to %50 open IIRC, Prop has 3 settings Max-Continuous-Econ,flap are default to up or down but can be setup manually for variable settings. ect) but still works pretty well.
The world is setup at campaign start at 50/50 town control you have to capture to a predetermined level (iirc 95%) for a side to win then the dev's setup an intermission for a couple of days or so then they reset the map back to start and do it over again.