Invade is a big word for you my friend, human waves times in GW1 is over, one cluster missile from Himras MRLS can incerate everything within 500 KM squire, only one missile. You know what kind of military you have. The only thing that Iran can hurt with is missiles and rockets and that can be solved with anti-missile defense systems and air-superiority over Iranian neighboring territories. Iraq was far more stronger than Iran today. It had about 17000+ ani air missiles, 4000 anti air canons, 5000 tanks (2600 T-72), 7000 (armored vehicles), 700 aircrafts; Mig-21-23-25-29, Mirage-f1, SU-22-20-25...etc. The first missile Iran launch on Azeris the game will be over.