Something Awful members have been playing Arma together with a rotating membership since there was an Arma to play, the latest incarnation of the group started with the tail end of Arma 2. We play twice a week using a core modset of ACE, TFR, RHS and CUP terrains (amongst others).
We host our own dedicated server and a custom mod repository. We have a strong assortment of mission-makers that provide high-quality and varied gameplay each session.
While we do try to play scenarios in a tactical manner, we have no interest in the roleplay that can be found in other communities. We have no minimum competencies or mandatory training, you'll never be told to call another play "Sir". All we ask is for players to communicate, try their best and observe Wheaton's Law.