Issoudun is a commune in the Indre department in central France. It is also referred to as Issoundun, which is the ancient name. Administration Issoudun is a sub-prefecture of the Indre department. History In 1195, Richard I of England defended the city from the advances of Philip II of France. Around this time the remarkable beak-shaped keep of the castle was built. In 1917, the U.S. Air Service established its largest European training center, the 3rd Aviation Instruction Center, about nine m… (More on Issoudun)