Scotland agrees that the necessity for well-defined chain of command of allied forces is crucial. However, it is unnecessary to have Supreme Command over all ATO allied forces. It is dangerous to put a military personnel over entire military. Military is a service to people, therefore a cilivian authority should take command. Scotland proposes that the theater commanders respond to the ATO Chairman rather than Supreme Commander.
I propose the following:
ATO Chairman: Elected by all nations of ATO to represent the ATO political, economic, and military operations.
Land:
Supreme Commander: In charge of operations in certain theater (i.e. European, South American, African, Mediterranean, etc). Answers to ATO Chairman.
Regional Commander: In charge of operations in specific region (i.e. German Front, Scandinavian Front, etc). Answers to Supreme Commander.
Sectional Commander: In charge of specific area/section of the front (i.e. Norther Germany, Southern Germany, Easter Scandinavia, etc) Answers to Regional Commander.
Regular nation specific commanders are below respective sectional commanders.
Navy:
Task Force Commander: In charge of all naval fleets in specific theater of war (i.e. North Atlantic Task Force, Caribbean Task Force, etc.)
Fleet Admiral: In charge of specific fleet (i.e. North Sea Fleet, Caribbean Fleet, Mediterranean Fleet, etc). Answers to Task Force Commander.
And below are nation specific admirals of flotillas, etc.
Air Force:
Air Force operations are respective to individual nations. Except for Air Marshal.
Air Marshal: In charge of all bombing raids and defense operations. Gives orders to nation specific Wing Commanders.