Companies Assigned to HQ's of a Communcations Zone
Is there a way to find out which companies were assigned to the HQ of a Communication Zone?
I have a letter that has the APO (APO 772) of my grandfathers company (3429th ORD MAM), which I was told during Mar. '44 - Oct. '44 the APO was in Naples Italy, then from Oct. '44 on it was in Marseille.
I was also told the APO was part of HQ, Delta Base Section, which included IIRC Cherbourg, Brest, OMAHA Beach Area, and the UTAH Beach Area and the communications corridors leading to the 12th Army Group rear boundary.
Either way, I was wondering if there is a way to track what Companies were assigned to this HQ.