My great-grandfather fell on Sept. 3rd, 1939 on the third day of WWII – can anyone tell me more about his rank and maybe the location of his grave in Poland? Picture is from August 1939

My great-grandfather fell on Sept. 3rd, 1939 on the third day of WWII – can anyone tell me more about his rank and maybe the location of his grave in Poland? Picture is from August 1939

by kemot88