Ok, so one of the missions is always the “easy” one: kill, capture, play. For 2 and 3 they can be anything. Even conflicting missions. The game needs to hard cap one of them to be a campaign one, and the 3rd is for the weapon/placement/misc mission. That way you don’t end up with 2 different campaign missions on your board at the same time.
Along the same lines, they need to make a third campaign mission type. Right now there is the Axis and Allies to play X number of games. They need a generic one where it doesn’t matter what side is played, just play.