Shipping tarrif codes for customers package

[aposm_0]

Hi I just tried to create a label in the US postal service office and it stops you asking for a code because it goes to FPO,AE. I'm told this is military. I want to do the right thing for this guy especially being a soldier. I tried a code I said online and it lights up green but it's a shot in the dark. Any suggestions is great and thanks in advance 

[wooden_flower]

@aposm_0 

Look up the tariff code here - https://uscensus.prod.3ceonline.com