Thanks for checking it. It seems like we have the same reference: "Order of Battle ...", 1948.
Have you any idea what would be the best way to getting more info in detail re the structure of that Group and After Action reports? (From the National Archives I only have got a copy of a page from the book above, nothing more as I already had known.)
I have best knowledge about the 6th Armored Div., unfortunately none of the veterans of the Super Sixth I asked, could recognize the 11th Armored Group. For me it is still an open question if there is a closer connection between the 6th AD and the 11th Armd Group, or if I should try another trail backward; maybe researching the Military Government Detachments will bring a light.
By the way, the detail "Aug 45 location" in the book "Order of Battle ..."is not correct for all those units or divisions which were as occupation power for the first post-war period in that part of Germany, where then the Russians went in. (For example the 6th AD, and with that also the 11th Armd Gp, were only until 2 July 1945 in Apolda. For the 6th AD I know that the Div. were moved to the Aschaffenburg area on 1/2 July '45 -- in August the repatriation of the Div. via Le Havre, France, started.)