History / Is there a list of those in the Polish Army during WWII? [193]

hi all I'm trying to find records of my great grandfather all we have is a letter he was going to send to hq to ask to leave the polish army and travel to Italy (he never went he stayed in uk) but we was under the impression he was also in the german navy (from the uniforms in the pictures) any ideas on how I can access these records of service hit a dead end on google something popped up about someone with the same name being sent to stutthof concentration camp too so very confused would appreciate any help