IN THE PAST MONTH, Iraqi and coalition forces have succeeded in their fight against the Mahdi Army’s “special groups.” On May 3, the U.S. military destroyed a special groups command center in Sadr City, killing a wanted leader in the attack. On May 25, Iraqi special operations forces captured a mid-level special groups leader in the al-Shuala area of Baghdad. And on May 31, Iraqi special operations forces captured another special groups “criminal” in Baghdad who was suspected of indirect-fire attacks on coalition forces. The frequency with which the term “special groups” has been thrown around in recent months (stretching back to the fighting in Basra that flared up in late March) highlights the confusion that exists over what these groups really are.