Answer The General Service Corps' main function was to act as a holding unit for Officers and specialists who have not been assigned to other units or corps; these are primarily reservists. The GSC is usually only active in wartime. Their cap badge is simple the English crest with the Lion and Unicorn.
it means world wide service.
Army Service Corps
Womens Volunteer Service Corps - Canada
US Army Air Corps
the peace corps.
General Montgomery
Major General George Barnett (1914-1920).
B, D, and E
Selective service system
Perhaps the Fifth and Sixth Marines because of their service in World War One,
I think it may have been Jimmy Doolittle. It was General Henry Harley "Hap" Arnold.
Yes, General Montgomery was an important British commander during World War 2