Originally Posted by MontyB

Yeah but its the List connection that should be easy and yet isnt as he was not in command of Army Group A for very long (July to early September 1942), he seemed to have a flair for being sacked by Hitler.
As for Army group A it was formed when Army group South was split into Army groups A and B with A taking the south eastern command however I cant find anything on what they achieved as they seem to have been over shadowed by army group B's activities at Stalingrad.

So my guess will be that elements of army group A were the only ones to reach the Caspian Sea.