Prior to the First Chalupistan War, Southern Chalupistan's airforce consisted of a number of WWII and Korean War-era aircraft. The most modern air-superiority fighter was the F-86 Sabre. Their valiant efforts were no match the Soviet-trained, MiG 21 jets of the North. At the peak of the crisis, the USA rushed much needed weaponry to the beleaguered South. This included a number of F-100 Super Sabres. One squadron of them still remains today.
F-5E Tiger II
In addition to the Super Sabres, the US supplied the South with the F-5E Tiger II. After the war, Southern Chalupistan ordered more F-5E's and well as RF-5E Tigereye reconnaissance planes. Until recently, the F-5E made up the backbone of the South's fighter squadrons. Currently, they are being replaced, but still make up three fighter squadrons.
After the "Line of Death" incident in 2007, the South decided to upgrade their front line fighters. Trade agreements with Israel allowed for the purchase of Kfir C.7 fighters. Only 14 have been delivered. Two have already been shot down during the opening hours of the Second Chalupistan War.
Learning lessons from the First Chalupistan War, the South decided that they needed a dedicated ground-attack aircraft to counter armor and mechanized forces. They were initially going to purchase the A-7 Corsair II, but this fell through. In 2004, a treaty and trade agreement with Brazil brought in a number of various weapon systems, including the AMX ground-attack fighter. The South has a number of light aircraft used in COIN operations against various rebel groups, but role of the AMX is dedicated to air support and interdiction roles against the mechanized armies of Northern Chalupastan.