what is an apo address

An APO address is a military mailing address used by the US Military Postal Service to deliver mail and packages to military personnel overseas. APO stands for Army Post Office and is associated with the US Army and Air Force. FPO stands for Fleet Post Office and is associated with the Navy and its ships. The address format for APO and FPO shipments is the same as for domestic shipments, with the addition of the APO or FPO designation and a two-character "state" abbreviation of AE, AP, or AA, depending on the location of the military unit or installation. Military postage rates are the same as U.S. domestic postage rates, and APO and FPO packages must be sent via USPS.