I was able to obtain my Grandfather's WWII Record and Report of Separation Honorable Discharge. I know his branch was Army. The form indicates he was with Company B, 17th Infantry. I did a simple google search and I saw: 17th infantry regiment 17th infantry Division 1st battalion 17th infantry 4 battalion 17th infantry Confused - How do I know what group he was assigned to? Are these the same? Under "Battles and Campaigns" the form indicates he fought at Ryukyus. I've gathered this is a group of islands - Okinawa being the largest. Is it possible to narrow down were exactly my Grandfather fought?