@Paul-Thomas Awesome! Glad to have you. Typically we do team selection based on number of people who showed up. Some people like to play solo and some have partners, but we try and divvy the folks up so that we have an even number of teams. Team vs. team matchup is determined by random matching (typically the out of a hat method :P ). The matchup decides which board they want to play between them. Any official A&A game is allowed for selection, but if an agreement can’t be made the default is 1940 Europe for the qualifier rounds and 1940 global for the final. The teams then bid for sides, roll for first bid and can go whichever direction you’d like. Once sides are selected the teams decide internally if they want to divide themselves up by country or not. At that point, game on!
Hope that helps! Let me know if you have any other questions and I’ll see you in a week and a half :) .