The base covers two areas: an island air base and a mainland installation. A prison is included as part of the base. The mainland installation is used as a decoy base and possesses no runway functionality. A large variety of mothballed aircraft are stored there, including F-16C Fighting Falcons, F/A-18F Super Hornets, C-17A Globemaster IIIs and B-52H Stratofortresses. A small naval dock is situated on the edge of the island airbase, housing three ships of the Osean Maritime Defense Force.
The base was originally belonged to an unnamed Usean country, and the runways were purchased by the Osean Federation. Originally, it was a key point in a defensive line along the Payton Channel until the middle of the 1900s.
The base became a garrison for Osean forces, as well as a reform center for soldiers that had deserted, behaved in a dishonorable manner, or otherwise had disorderly conduct, from both Usea and Osea. It quickly became a penal colony due to its isolated location for the convicted Osean military personnel. Avril Mead was also sent here despite being a civilian.
On the outset of the Lighthouse War, Osea devised to use the base as a lure. Fake targets including planes and even runways were set up for Erusean forces to bomb. It was Osea's intention to build up their forces elsewhere while this base served to distract Erusea.
Spare Squadron was later formed from pilots who were serving sentences at this penal base. It also served as their base of operations until Operation Full House where majority of Spare and the base personnel would be stationed in Tyler Island while the General Staff Office personally assigned Trigger and Count to escort the transport of base commander D. McKinsey, on route to Bulgurdarest.
- The number 4 is considered an unlucky number in Japan, China and Taiwan; it can be pronounced "shi", which shares the same pronunciation for death (死).
- The 444th Air Base may be based on the former Johnston Island Air Force Base in Johnston Atoll.
- The use of inflatable dummies by the dummy air base is a reference to Operation: Fortitude, a World War II Allied deception operation intended to convince the Germans that the D-Day landings would come by way of the Pas de Calais instead of Normandy.