A famous African American unit, the 99th FS, better known as the "Tuskegee Airmen" or "Redtails", flew P-40s in stateside training and for their initial eight months in the MTO. On 9 June 1943, they became the first African American fighter pilots to engage enemy aircraft, over Pantelleria, Italy. A single Focke Wulf Fw 190 was reported damaged by Lieutenant Willie Ashley Jr. On 2 July the squadron claimed its first verified kill; a Fw 190 destroyed by Captain Charles Hall.
This was also the plane that was present in Pearl Harbor when it was attacked on December 7th, 1941, where only a handful of pilots could have made it into the air, and it's sister aircraft, the p-51 "Mustang", took it's place after the war (as a front-line aircraft that is) the P-51 was still being built for missions in Korea and Vietnam, and it's production was stopped in August of 1969, when they came out with the Lightening Bolt-II. But none of that would have been possible without the production of the P-40. The P-40 was a remarkable and sexy aircraft We had the Germans and Japanese running!
it was USED as such, but was NOT designed for such use. The fact it succeed so well at so many roles it was used for is a testament to how well it was built and designed.
As for the 28 air forces thing, it was used by ONLY 15 and only then if you count CAPTURED CRAFT!!! Curtis-brand fighters were used by 28 air forces, but the P-40 airframe series only equipped 15. Get yer facts straight!!!
And BEFORE everyone flames me with the images of that Kittyhawk with all the markings, observe the nose marking that says "5000th CURTIS Fighter" on the nose. if it was used by 28 nations there would be an average of only 490.6 of them in every nation, when the US had 1000 at home, and another 8000 spread across the world. Britain had 750 on record, BRAZIL had another 400, RUSSIA had (and redesigned) some 1400... start checking the numbers listed by the countries and do the math, people!
Oh wait. 90% of America CAN'T even READ, much less do ADDITION. MY BAD!
I didn't go into such detail about the aircraft because there is no use to go into such detail about it. Besides, I used to study WWII aircraft. I think I kniw what I'm talking about. Thanks though