GrauGeist
Generalfeldmarschall zur Luftschiff Abteilung
Who's they?The appearance of the Ki-44 in China came as a nasty shock to Chennault's boys who up to then had had a field day with the Ki-27s and Ki-43s. They considered it better than the P-51.
It couldn't have been the AVG/23rd FG, because the P-51 didn't reach the PTO until much later in the war and by the time the P-51 did get into China, it's main adversary was the KI-84.