Moqtada Sadr promises to help defend Iran. The Iraqi Shi'ite leader promised to defend Iran -- presumably in Iraq -- if Iran is attacked by the US. Moqtada Sadr is the commander of the Mahdi Army, which fought US troops for weeks in the Iraqi holy city of Najaf, threatening to unite poor, discontented Iraqi Shi'ites in common cause with Sunni insurgents. Sadr and his followers are known to have close ideological and logistical links to clerics inside Iran. In the event of a conflict with Iraq, their assistance to the Iranians could greatly increase instability within Iraq, possibly assisting elements of Iran's Revolutionary Guards' Qods Force in infiltrating Iraq and orchestrating attacks upon US interests.