Gentlemen
I am not the Worlds Autority on this subject BUUT, I have served 17+ years in the RAF & have access to the UK MOD historcal Archives.
Here is some interesting info on the American Spits:
Two American Army Air Corps Fighter Groops were privileged to fly British Spitfires in WWII: the 31st & 52nd.
The 31st takes the Honor of being the firts American unit to fly & Fight over Europe since WWI. While they were briefly based in England, Neither group saw heavy action but that all changed when they were shipped to North Africa.
The 31st formmed in USA late January 1942(Harrison R Thyng became the first 309th Squadron commander) by August 1942 Thyng & the 309th were engaged in fighter sweeps over the English Channel from RAF West HAmpnett equipped with the Spit V( that same month Thyng logged a damage claim on an FW190 the first claim by an American pilot against the Luftwaffe)
That same year saw the 309th shipped to the Mediterranean theater via Gibralter( the 309th had to exit Gibralter fast it had only just been captured from the Germans) they picked up thier Trusty Spit Vs & flew to Tafaraoui Airfield in Algeria( the 31st Group consisted of the 308th & 309th Sqns at this time)
The Americans did not have to wait long for action in fact on arriavl to Tafaraoui Airfield they were attacked by four enemy aircraft( Thyng Red Flight shot down 3 out of 4 of the attackers. the 31st got itts first confirmed kils but lost thier first KIA Joe Byrd killed while trying to land.
I have volumes of info & Picture of the American Spitfire Experience but here are the figure of a superb Fighter Group:
On March 30th 1944 the Group (31st) officially finished flying Spitfires and was in the process of converting to the P51B Mustang.
307th Sqn 65 kills confirmed
308th Sqn 67 kills confirmed
309th Sqn 56 kills confirmed
31st Headquaters Group 6 kills confirmed
Group Total 194 kills confirmed in Spitfires
Spitfires flown MKvs & MK IX
Highest scoring Ace Lt Leland Molland 11 kills
The 31st Fighter Grop produced 39 Aces, 15 from the 309th Sqn, 13 from the 307th Sqn & 11 from the 308th Sqn.
I am currently researching other American flown spitires the 7th Photo Group 8th & 14th Photo Sqns.
These brave men flew unarmed Spitfires on missions over Germany reecording Bomb damaged & looking for new targets for the Bomber groups to hit
Hope you find this interesting I will post more if wanted
Regards
Hopper 16 Grims Reapers