I always up at semi-capped and "capped" fields. It is interesting to watch. If you manage to get up, you can generally fly to the outskirts of the base, and develop some E to gain on the planes diving on the base to vulch, and nail em from the side/tail depending on the turn they take. I only get a few, though, because invariably, very few other countrymen are doing the same, so the vulchers turn it into a game of lemmings and mouse, some auger, eventually I get shot down. If more did this, it wouldn't be so easy to capture, as you say. I'm not that good a pilot, but when vulching, saucer eyes cause funny things to happen, and uppers sometimes can help defend a base merely by upping; they neglect the town, try to vulch, some succeed, some auger, some get shot down, but the guy in the M3/C47 gets left to die. Enjoyable results, since the death is merely cartoon plane and I can up a new one, but the troops IB take ALOT longer to return, if at all.