My great grandfather served in World War 2, and I did some research on him and found his military grave certificate and I am familiar with how the US Marines organize their units but the Army in this period baffles me with their division numbers. It says 36th Med Tnq BN does that mean he was part of the 36th ID and was just a part of the headquarters battalion? Or was attached to the medical regiment? Any clarification would be awesome, Thanks.
Hello there! As your question is related to looking for identification/information regarding military personnel, our Guide on Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!
In WW2, units were grouped into Divisions which were broken down into battalions which are made up of companies. Some Battalions (like medical battalions) tended to be more "independent" units and were "attached" to divisions/armies/groups/etc.
It appears your grandfather was in the "36th Medical 'Tnq' Battalion," and he was in the Headquarters Company of that Battalion. There were likely other companies in that battalion.
I am not sure of the "Tnq" designation, but I will dig a little further and edit my response if I discover a little more.
Edit - the word is "Tng" which stands for "training." Your grandfather likely served stateside training other to be combat medic personnel.