Has anyone tried to research the lineage and commendations of their unit, batallion, brigade, army, company? I recently bought a book to trace a Pres. Unit Citation for the parent Regiment of one of my ADA brigades. I wondered how a Navy Citation was awarded to a field artillery brigade. I found a military textbook that traced the lineage of ADA units from the Revolutionary War through Vietnam. I found a series of books at US Army Center of Military History and bought one from a used bookstore online.
If you want to get confused, travel back in time starting from your present unit and see how many reorganizations ot will go through from inception and how they earned their Unit Citations. It will amaze you.
Go to the CMH below and click on "online bookshelves", Army Lineage Series of books. I bought my book here;
http://www.alibris.com/
http://www.army.mil/cmh/