how can I find company and division

It is worth nothing that this is most likely Company K, 29th Infantry Regiment and Company B, 38th Infantry Regiment.  The regiment would be an intermediary level of organization between the company and the division.  A given infantry division would have several infantry regiments, each of which would have its own Company A, Company B, etc.  

Histories of these regiments can be found here:  

https://en.wikipedia.org/wiki/29th_Infantry_Regiment_(United_States)  

https://en.wikipedia.org/wiki/38th_Infantry_Regiment_(United_States) 

However, to expand on what Lisa said, he likely served in multiple units during the course of his military career, especially given that he retired as a master sergeant.  

If you have a chance to visit the National Archives at St. Louis or hire a researcher in that area, they have unit rosters through 1943 and morning reports for the entire war that might be helpful in tracking his subsequent career.  Unfortunately these aren't online yet.

https://www.archives.gov/st-louis 

You might also want to email St. Louis directly and explain what you got on the NPRC request 4 years ago, and ask if it might be possible for a more complete response to be given now that an additional 4 years have passed since his separation from service.  Records become archival and therefore more open to the public 62 years after separation from service, to include any reserve time.

So I have a glorious update since my first entry. I have found "hints" in letters then explicit (some very disturbing) information in letters dated AFTER May 15th 1945. This quest has occupied my thoughts and life for a solid 6 weeks. I'm getting so close. I lost any connection of him in 1943. I was told he went to Iceland and now made "that" connection. I was confused about his accounts of Cherbourg (not Normandy) but now know he then joined Patton's 3rd Army after battle in Liege (which he later says was the worse place ever), St. Lo, mentioned "hedgerows & pillboxes" which, no clue until I drilled down weeks later, left Patton's 3rd Army and joined the 4267th Quartermaster Truck Company which there is absolutely NO records published "yet". I did find a report written by Brig. Gen McNamara outlining 1st Army through Europe. After leaving the 3rd Army, he joined the 9th Army- Quartermaster Truck Company and references "Red Ball Express" often. He even sends newspaper clips. I'm not certain of the (9th Army) but he says that's where he went after 3rd. But no doubt, he was mailing home 4267 Quartermaster Truck Co, APO 350 for almost a year. His letters his December 1944 are normal and they reference "hope we eat as good on Christmas as Thanksgiving", next letter dated the 16th December 1944, we are leaving so I can't write every day AND was transferred "yesterday" to 1st Army. So history is clear. He says he has "lots of points" since he received 4 stars from "Fortification of Europe & Germany" and I cannot figure that out. He's afraid to come home later because they said he'd go to Pacific after.

So I find out, the army plays a "shell game" with soldiers and points and tries to "reassign" him. He tells my grandma his "new APO" but next letter says they cancelled his transfer.

I forgot to mention that he writes my grandma after May 15th, that if she saw any newspaper of the "crossing of the Rhine", then she'd see his truck crossing the temp bridge, Couldn’t see him but that was his truck,  I downloaded that photo

So until August 1945, he is hauling German prisoners back to Berlin. He actually (typed for only the 2nd time) a V-Mail dated 4-17-45 what he witnessed the day before. What he witnessed I now know was the beginning of the nightmares he had written many times about and my grandma telling me when he got home she was afraid of him hurting her because of bad dreams. They were a 1/2 day behind the Gardelegen Massacre. The V-mail affected me greatly. He had already passed the Malmedy event so this is the second. 

After the war was over, they had his company transporting prisoner’s non-stop. He never sleeps, food isn't provided, Russians are stealing everything and his convoy has been held up 2 times, both 5-7 hours. Russians would take the female prisoners and rape them all, in plain sight he said. If they resisted, they killed them. He drove up until August 5, 1945. It was only then that they inspected his trucks and told them they were going home.

To end my long and rambling email, the things I am trying to piece together now is anything about 4267 Quartermaster Truck Company and their "activities" reports. To my knowledge and all of my never-ending searches, I have hit a dead end. It shows the Archives "have" files but not available yet. I also contacted the Quartermaster Museum and they have no info either.

You all have been a Godsend from day one and those "hints" have helped fill in a lot. He reinlisted in the Air Force and I am in touch with Vance AFB Historian and making a trip on September 25th to visit on base about his "after Army" carreer with was full of adventure itself 

Blessings to all! I'm just a proud grandaughter to an amazing grandpa, war hero and Master Sergeant, Glenn Morse Hardgrave!

Angela Hardgrave Hudson

PS: Now I have an outline, I have a friend who is a published author (history mostly) whi is helping me write a report to present to the WWII museum for the archives at my appointment with "their" historian in November! :-)

The 4267 Quartermaster Truck Company would be a Corps level asset. There will likely be little published information. They should still have Morning Reports, those are available from the National Archives St. Louis MO location. You will need to go and make copies yourself or pay a researcher to do it for you. Someone with the NA will probably reply with more information. Unit Journals, if they had one would be at the College Park Maryland, National Archives location, same as above you will need to visit to obtain copies.

Good luck with your search, it seems like you have done a great job already.

Lisa Sharik

The 4267 Quartermaster Truck Company would be a Corps level asset. There will likely be little published information. They should still have Morning Reports, those are available from the National Archives St. Louis MO location. You will need to go and make copies yourself or pay a researcher to do it for you. Someone with the NA will probably reply with more information. Unit Journals, if they had one would be at the College Park Maryland, National Archives location, same as above you will need to visit to obtain copies.

Good luck with your search, it seems like you have done a great job already.

Lisa Sharik