When I look at the Zones for the U.S (Zen Cart v1.3.8), I see the six zones for United States Armes Forces as follows...
United States Armed Forces Africa AF
United States Armed Forces Americas AA
United States Armed Forces Canada AC
United States Armed Forces Europe AE
United States Armed Forces Middle East AM
United States Armed Forces Pacific AP

However on the USPS web-site, they specify the AE code for Africa, Canada, Europe and Middle East.

Is my system wrong, or is it different for a reason?
I apologize if someone else has already dealt with this minor issue.

Thank you.