TFT crossed into Iraq on March 21, 2003 with the missions of securing Jalibah Airfield and then securing the 3 bridges over the Euphrates River at An Nasiriyah to allow the 1st Marine Division to continue its attack north. From March 23 to March 29, 2003, Task Force Tarawa was engaged in heavy fighting in and around the city of An Nasiriyah as they came in contact with Saddam Hussein’s Fedayeen and members of the Iraqi 11th Infantry Division. TFT lost 18 Marines in the fighting and were involved in a friendly fire incident in which two A-10 Warthog aircraft killed a number of Marines when they strafed their Amphibious Assault Vehicles with 30mm depleted uranium rounds and Maverick missiles. The A-10 pilots were not prosecuted.
After leaving An Nasiriyah, the Task Force was tasked with securing the highways to the rear of the 1st Marine Division and on April 3, 2003 they secured the town of Ad Diwaniyah. They continued to move and on April 7, pushed into Al Amarah, securing the 10th Armoured Division HQ and the nearby Al Amarah airfield and finally ended the invasion outside of Baghdad after conducting security and stabilization operations in Al Kut on April 11.
On May 14, 2003 Task Force Tarawa turned its Area of Operations over to the 1st Marine Division and returned to the United States via naval ship.