Complex sentence: After the 1979 Revolution, the then commander of the Imperial Iranian Army Aviation Manoochehr Khosrodad was executed; he was the also founder and former commander of the 23rd Airborne Special Forces Brigade.
Split into simpler sentences: After the 1979 Revolution, commander of the Imperial Iranian Army Aviation Manoochehr Khosrodad was executed. He was the founder and former commander of the 23rd Airborne Special Forces Brigade.