Rather cleverly the designers have made it so that you are either the Axis or the Allies. You cannot have mixed teams.
Plus they have also designed it so that an enemy team appears as one colour despite there being a multiple number of players. This creates a united front feel to the game and you're never sure of who you may be fighting off at any one time. Very cool.
It seems that this event is going to be a bit of a leviathan.
I'll post up when I've ordered CoH and when it should be being delivered. I won't be ordering before Saturday, though... might get it back for Tuesday...?