A common threat in Iraq
US and Iran has common interests in Iraq to some extent, confirmed when US Joint Chiefs of Staff Gen Martine E. Dempsey pointed out the difficulties, he concluded that although the goals may be same but policies are not going to be aligned. As Iran is shia majority and interested in shia holy places in Iraq. He declared Islamic State of Iran al-Sham or now known Islamic state as the issue for both US and Iran.1 million Iraqi army and government as well are demoralized after the recent IS’s advance on Mosul the second biggest city of Iraq. The Islamic state led by Abu Bakar al-Baghdadi after proclaiming caliphate, announced to stretch it borders from eastern Iraq to Aleppo province of Syria and then rest of the Muslim world, challenging the fertile crescent existing borders. More significantly, Sunday`s declaration dislodges Ayman al-Zawahiri from his position as chief of all jihadist movements. The Al Qaeda chief did not get along well with Baghdadi whose extremism was apparently more than what even Zawahiri could stomach.
Saudi Arabia important Muslim country had announced not allow ‘`a handful of terrorists ... terrify Muslims` so all the three –US , Iran and Saudi – had common interest in Iraq, but it is not possible for US and Iran forget all their differences but they could come to a temporary agreement to recue Iraq and save its territorial unit.


i know it is not upto the mark but it will be inshallah with your suggestions and correction.