Just before WWII, the "allied countries" provided a looot of capital@technology to 3rd Reich.
<WALL STREET AND THE RISE OF HITLER >
WALL STREET AND THE RISE OF HITLER, by Antony C. Sutton
You really don't know Spitfire21's story.
The Royal Air Force - History Section
P51H and P80 are ready IN WWII, howver, german troops were at berlin not new york, so US army didn't have to send out their P51H and P80 jet plane in a hurry.
<WALL STREET AND THE RISE OF HITLER >
WALL STREET AND THE RISE OF HITLER, by Antony C. Sutton
Anyway for your information the P-51H Spitfire Mk.21 didn't see service in WW2, something which you unsurprisingly didn't know.
You really don't know Spitfire21's story.
The Spitfire F.21 entered service with No 91 Squadron at Manston in January(1945,glen), despite having suffered early handling problems. This Mark had a protracted development, first flying as early as July 1943. The wing was strengthened , and the ailerons extended. The undercarriage legs were also extended, to enable a11ft Rotol 5 blade-prop to be fitted. The modifications to the structure meant that a new name of Victor was considered for a while.
The squadron began operations with modified aircraft from Ludham in March, flying armed reconnaissances and on 16 April, two aircraft strafed a midget submarine they caught on the surface and claimed it as sunk. 91 sqn was the only squadron to operate the Mk.21 during WW2.
The Royal Air Force - History Section
P51H and P80 are ready IN WWII, howver, german troops were at berlin not new york, so US army didn't have to send out their P51H and P80 jet plane in a hurry.