how can I find company and division

Question

How can I find WWII info on what Company? (A-B-C) or Division (infantry?) my grandfather was in? 
 On Musters of 4-30-1939, it's Company K, 29th Infantry. But 4 months later on Muster dated 8-31-1939, it says Co. B, 38th Infantry. 
 Most confusing is the Army - Army Air Corp division & "searches" and he actually retired from the military at Vance Air Force Base, so he's shown as the Air Force also. 
 So many moving variables. 
 I want to see if I can possibly pinpoint him overseas - Normandy, Northern France, Rhineland, Ardennes & Central Europe (which I know from his medals he received) but I'm confused as to what search "words" to use to drill down to facts. 
 His name was Glenn Hardgrave, retired Master Sergeant and his Army serial No. was 06260307.

JohnCyr · Accepted Answer

I'm interested, but couldn't find your email address in your profile. Just let me know how you would like to make contact.

History Hub Info · Answer

Dear AngelaHudson 
 Thank you for posting your request on History Hub. 
 Assigned units are contained in the veteran's personnel record. We suggest that you request a copy of his Official Military Personnel File (OMPF) . OMPFs for officers and enlisted personnel of the U.S. Army who were separated from the service after October 1912 and before October 2002 are in the custody of NARA's National Personnel Records Center (NPRC) in St. Louis. 
 In many cases where personnel records were destroyed in the 1973 fire , proof of service can be provided from other records such as morning reports, payrolls, and military orders, and a certificate of military service will be issued . If there is any information requested by the form that you do not know, you may omit it or provide estimates (such as for dates), but the more information you provide, the easier it will be to locate the correct file if it survived the fire. Archival OMPFs may also be requested by visiting the Archival Research Room at the National Archives at St. Louis . Please see the linked web pages for more information. Please email stlarr.archives@nara.gov for further assistance prior to making an appointment. 
 Please complete a GSA Standard Form 180 and mail it to NARA's National Personnel Records Center, (Military Personnel Records), 1 Archives Drive, St. Louis, MO 63138-1002. Veterans and next of kin of deceased veterans also may use eVetRecs to request records. See eVetRecs Help for instructions. 
 For more information see Official Military Personnel Files (OMPF), Archival Records Requests . 
 We hope this information is helpful.

Textual Reference Branch, Archives II · Answer

AngelaHudson 
 Thank you for posting your question to History Hub! 
 
 It seems our community has provided good resources for you to consider. In addition to those suggestions, you might want to consider the information below. 
 
 The Textual Reference Archives II Branch (RR2RR) has custody of the Records of the Adjutant General's Office, 1917- (Record Group 407), U.S. Army Command Reports, 1949-54, and the Records of U.S. Army Operational, Tactical, and Support Organizations (World War II and Thereafter) (Record Group 338). Command reports among these records consist mostly of narrative historical and after action reports as well as unit journals and other supporting documents. Because the files are arranged hierarchically, identification of the specific unit (i.e., division, regiment, and battalion) and date of interest are necessary before a search can be conducted. We do not have a name index to these records. 
 
 While these records focus on the unit as a whole rather than on the individual soldier, they may be able to assist with creating a timeline through the records created by the unit. The records in the World War II Operations Reports typically only go to the lower echelon of regiment for Infantry in the organization of the records, but there are times where company files can be found amongst the regimental records. We were unable to locate records for the 4267 Quartermaster Truck Company, but there may be records mentioning this company in higher echelon records. We will be happy to make the records and their finding aids available to you or your representative in the Textual Research Room (Room 2000) here at the National Archives at College Park, Maryland. Please visit our website for information about visiting the National Archives in College Park, MD, including how to schedule a research visit. 
 
 Since you believe that Glenn Hardgrave may have switched to different units during the war, Morning Reports may assist with tracking the next unit after his transfer. Morning reports for Army units (from November 1, 1912 to 1959) and Air Force units (from September 1947 to June 30, 1966) are in the custody of the National Archives in St. Louis, MO. Please contact them for access to these records. The address is the National Archives in St. Louis, 1 Archives Drive, St. Louis, MO 63138-1002 and the email address is stl.archives@nara.gov . 
 
 We invite you to continue the conversation with community members on History Hub, but should you have follow up questions for the staff at Archives II, please email us at archives2reference@nara.gov so that we can assist you further. We hope this assists you with your research! Sincerely, Textual Reference Archives II Branch (RR2RR) [RR2RR 23-59673-LN]

how can I find company and division

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