http://www.alertnet.org/db/crisisprofiles/571273.htm?v=in_detailU.S. abuses
Although the United States formally returned sovereignty to an Iraqi interim government in June 2004, the coalition has about 160,000 troops in the country.
In its campaign to stamp out the insurgency the U.S. military has been accused of killing civilians, mass detentions and torture.
Iraq's Prime Minister Nuri al-Maliki, a tough talking Shi'ite Islamist, has said he is losing patience with the reports of civilian killings.
U.S. troops have said they were acting in self defence in some cases, but the military has launched investigations into several incidents. These include the alleged massacre of 24 unarmed Iraqis in the town of Haditha in November 2005.
In another high profile case, U.S. soldiers have been charged with the rape and murder of a 14-year-old girl and the murder of her parents and six-year-old sister near Mahmudiya in March 2006.
Human rights watchdog Amnesty International has expressed concern at what it calls "indiscriminate" violence against Iraqis by the U.S.-led force.
It also says coalition forces are holding thousands of detainees indefinitely. The U.S. military says the detentions are justified on security grounds.