Having spent a few years in both Iran and Saudi in the aviation business - even involved in training Saudi mechanics I have come to the conclusion that the Iranians would find it relatively easy to overcome the Saudi military. The average Saudi is lazy,utterly selfish and frankly not too bright. Marrying their cousins for generations has done them no good. I watched a team from Germany trying to teach Saudi special forces aircraft assault techniques,it was hysterical - some were unable to climb a ladder due to lack of co- ordination. There were MP5 submachine guns lying all over the ramp,soldiers sleeping while leaning on tires. The German in charge did not say much but was obviously not impressed. I believe a large proportion of the Saudi military is comprised of Pakistani mercenaries - I doubt they would be prepared to sacrifice themselves for Saudi Arabia.