So don't let them capture those bases?
What would stop a persistent vulch from happening at these uncapturable fields?
Unfortunately during off hours the MA is closer to what early war used to be...a horde vs few...so yea you might put up a good fight to defend but they we most likely win. Also a lot of the time when there is action in the center people are paying attention to those fields so they get the sneak.
It's rather difficult to vulch a large airfield, wouldn't you agree??? POTW is one of the largest squads still in game and we would have problems holding a large field vulch....not that POTW would try to take one unless it was the last field to win the war.