Basically, if I have x hours to play:
10 hours: Global 1940
8 hours: AA 1914
6 hours: Europe 1940/Pacific 1940
4 hours: Spring 1942, 2nd Edition
3 hours: BotB/Guadalcanal/DDay
2 hours: set up Global for a future game
That is why I wanted BotB/Guadalcanal/DDay for shorter play. I have AA 1941 for short plays, but I think its a bad game, not enough piece, multiple errors on board and rulebook. Plus the game is really unbalanced.