Helicarrier

Recent reports from a time travel have informed us about a top-secret unit developed by the Allies during Great World War II, the Helicarrier. It was essentially a big round ship which was able to carry helicopters (How many Longbows it was able to carry is unknown) and send them to destroy a base. This was rather useful because the helicopters didn't have to go back to the helipad for ammo supplies, but instead, they had to return back to the nearby-located Helicarrier, providing faster rate of assault. Why it hasn't been used in Great World War II is unknown, but it seems that it was very expensive and useless because the allies had already the Cruiser and the Longbows could have been shot down by SAM Sites. It is rumored that few of them have been introduced in some battles but there were no reports of soviet or allied commanders seeing them.

In Great World War III the Allies started to use Aircraft Carriers, that followed essentially the same principle of the Helicarrier.

However, a proof of its existance can be found here.