They gave P-39 to the "Commies" they wanted to Atom Bomb, 5 years later.
Oceania has always been at war wit Eurasia.
You see, the reasons were pantomime money games - then and now.
But the Aircobra! I'd forgotten! Mid-engine, with a cannon through the propeller shaft... Very interesting. If I recall, there were "Hugo Gernsback" type ideas to build dirigible aircraft carriers, with P-39s that would exit from a ramp, in the air... This was in the 30's, when Bell had a prototype, and LTA wasn't yet a disparaged idea. Way crazy.
The Russians rather liked the P-39, using it for low-level attack against German armor where the 37mm cannon could be used to good effect. It would also serve in that role in the Pacific, particularly in the Solomons, where the problems of liquid-cooled engines with fragile radiators in a tropical climate were made obvious. It apparently had the maneuverability of a concrete sled and when it faced Japanese opposition was shot down regularly. I wonder how eager pilots were to crashland one, given the mass of the Allison V-12 right behind the seat.
The P-39 did bring several innovations: tricycle gear in a fighter, mid-mounted engine with gear-driven prop to accommodate the nose-mounted cannon; car-style doors; heavy cannon armament. The attention paid to tight streamlining and integration on the prototypes was a drawback when it came to production, though, as there was no room for a turbosupercharger, fuel could be carried only in the wings, and upgrading the armament was difficult. Addition of self-sealing fuel tanks, radios, armor, and guns made the production P-39 over a ton heavier than the prototype.