Fallujah and Al Najaf

On March 31, 2004, Iraqi insurgents in Fallujah attacked a convoy containing four American Private military contractors from Blackwater USA who were conducting delivery for food caterers. The four contractors, Scott Helvenston, Jerry Zovko, Wesley Batalona and Michael Teague, were attacked and killed with grenades and small arms fire. Their bodies were hung from a bridge crossing the Eurphrates. This event was one of the causes of the U.S. military attack on the city in the First Battle of Fallujah. In the fall of 2007, a congressional report by the House Oversight Committee found that Blackwater intentionally "delayed and impeded" investigations into the contractors' deaths.
In April 2004, a few days after the Fallujah bridge hanging, a small team of Blackwater employees, along with a fire team of U.S. Marines, held off over 400 insurgents outside the Coalition Provisional Authority headquarters in Al Najaf, Iraq, waiting for U.S. troops to arrive. The headquarters was surrounded and it was the last area in the city that remained in coalition control. During the siege, as supplies and ammunition ran low, a team of Blackwater contractors 70 miles (113 km) away flew to the compound to resupply and bring an injured U.S. Marine back to safety outside of the city. In April 2005 six Blackwater independent contractors were killed in Iraq when their Mi-8 helicopter was shot down. Also killed were three Bulgarian crewmembers and two Fijian gunners. Initial reports indicate the helicopter was shot down by rocket propelled grenades. In 2006 a car accident occurred in the Baghdad Green Zone when an SUV driven by Blackwater operatives crashed into a U.S. Army Humvee. Blackwater guards allegedly disarmed the Army soldiers and forced them to lie on the ground at gunpoint until they could disentangle their SUV from the wreck.