NKP Airbase APO 96310

Shown is a cover from APO 96310 located at the Nakhon Phanom (Royal Thai) Air Base in Thailand, on the border with Laos. The United States flew reconnaissance flights over the Ho Chi Minh Trail and covert ground support missions over Laos from this base during the Vietnam War.

NKP Air Base also corresponds with Operational Location 23-27 as shown in the address ("OL 23-27"). The postmark reads Jun 20 1969.

Thanks to a reader, "CMR" in the return address has been identified as "Consolidate Mail Room"

Map image source: http://aircommandoman.tripod.com/