sentences:  After the Islamic Revolution in 1979, the regular army and air force had suffered due to purges and lack of supplies and spare parts from their former Western allies, especially the US and UK, and was no longer the fifth most powerful military in the world.Meanwhile, a new force, the Islamic Revolutionary Guard Corps (Sepah-e-Pasdaran) gained prominence.Meanwhile, the conflict between the Pasdaran and the Army entered a new phase after the war began in 1980.