I did a 'can you name these warbirds' quiz online just to feel smug, and came across the Republic P-43 Lancer.
I was intrigued, and had a (very) quick browse online, and kept coming across variations of this statement
until the arrival of the P-38, the Lancer was the only Allied fighter capable of catching a Japanese Mitsubishi Ki-46 "Dinah" reconnaissance plane at the speeds and heights at which they flew.
However I can't find any hard info on who actually used it, where or what for - except the Chinese who lost a lot to Japanese fighters.
Can anybody here fill in the service history and satisfy my curiosity?