I forget the entire roundabout story, but it turned out that they were Koreans, who had been conscripted and captured enough times by the Chinese, Russians, Germans and I forget who else that they found themselves in the Wehrmacht fighting against the allies at Normandy.
These guys in this picture don't necessarily look like conscripts or POWs, though.
The famous picture of the Oriental German captured in Normandy was indeed Korean. He was captured by the Russian in Manchuria and forced into the Red Army to be captured later by the Wehrmacht. Soviet POWs were offered release from POW camps if they served in labor battalions and as other general labor troops. Those later recaptured by the Red Army were executed. This guy got lucky, he returned to South Korea and lived a long life.