Thanks for your help! I know my grandfather was reassigned to Company C, 423rd Inf. in may-june of 1945. I know that it was part of the 106th, and i know most of the 423rd was either killed or captured during the bulge, and he was most likely a replacement.
He brought home a bunch of souveniers, one a 4th army patch, another of the 'Western AA Command' ???, and the most interesting one is the 75th Inf. Division patch. All i can tell that the 3429th wasn't part of the 75th.
I also have his report of separation, which states he took part in the following campaigns: Nothern France, Rhineland.
I was curious if an ORD company would be part of a larger organization, like a ORD batallion, or Dept. or something. I am unfamiliar with the unit organization involved.