The ISAF Air Force is the airborne branch of the Independent State Allied Forces military. As part of the coalition forces allied against Erusea, the ISAF Air Force was comprised of aircraft, aircrews, and pilots contributed by the ISAF member nations. During the Second Usean Continental War, the ISAF Air Force suffered extensive losses as a result of Erusea's deployment of Stonehenge; the resulting loss of air supremacy forced ISAF to retreat to the east and eventually withdraw from the mainland.