During August 2004, the MEU, led an assault consisting of 1st Battalion, 4th Marines; 1st Battalion, 5th Cavalry Regiment, 1st Cavalry Division; and 2nd Battalion, 7th Cavalry Regiment, 1st Cavalry Division, against the Islamist Mahdi Army of Muqtada al-Sadr in Najaf.
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On 31 July 2004 the 11th Marine Expeditionary Unit, under the Polish-led Multinational Division Central-South (MND-CS), assumed operational control of the Iraqi provinces of An Najaf and Al Qadisiyah from Task Force Dragon, composed of elements of the 1st Infantry Division.
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