see Army and Air Force Post Office.

Army Post Office. An official United States post office for use by U.S. military units abroad. An army post office or military post office is set up to distribute mail to and from military personnel. Locations are indicated by numbers only to prevent revealing personnel locations. The locations become generally known after a war is over.

area post office

Academic Personnel Office

Army Post Office. An official United States post office established for use by U.S. military units abroad. An army post office or military post office is set up to distribute mail to and from military personnel. The APO is indicated by numbers during wartime to prevent revealing personnel locations. The locations become generally known after the conflict ends.

the acronym for " Army Post Office"

army post office. A branch of a designated USPS civilian post office, which falls under the jurisdiction of the postmaster of either New York City or San Francisco, that serves either Army or Air Force personnel. Also see military post office.

Acting Pilot Officer

rmy [Air Force] ost ffice - A military post office that is located outside the continental United States

Army post office located in San Francisco for overseas mail to Vietnam.