Ok, that makes sense... It also gives a constant purpose to tactical bombers (especially if we don't allow strategic bombers attack at low alt). I think that makes sense. We'll need another mechanism for combining two depleted battle groups together (probably as simple as moving them both on the same tile and pressing k). I think we just use the points system for additional battle groups. Perhaps the Allies start with 1 or 2 and the Germans with many, so D-Day "could" occur at any moment, but probably wouldn't be successful without reinforcements and a build up. The Germans would be unlikely to invade Englsnd early because the same concept would apply to naval task forces. The Germans might start with 1 and the Allies several, and these are the transport ships, so unless the Allies truly botch it, they should be relatively safe from invasion, unless the Germans do really well.