From what I understand, 7,65mm lugers were issued to some folks, like Railroad Police and other gov't officials. The 9mm was a military and police round, but the 7.65mm was in use by many people. And remember, many of the lugers left the DWM factory in 7.65mm in the 1920's and then were rebarreled for the police. I would bet that many GI's would have trouble knowing the difference in uniforms in rank, especially a lot of WW2 civilian uniforms look pretty impressive, irregardless of their rank compared to a GI in fatigues
