http://www.financialexpress-bd.com/index3.asp?cnd=4/8/2007§ion_id=4&newsid=57676&spcl=no<snip>Under the 1949 Geneva Conventions, an occupying power has a duty to ensure public order and safety in the territory under its authority. The duty attaches as soon the occupying force exercises control or authority over civilians of that territory.
International law also stipulates that the occupying force is responsible for protecting the population from violence by third parties, including newly formed armed groups.
Occupation forces have under the law the duty to ensure local security, which includes protecting persons, including minority groups and former government officials, from reprisals and revenge attacks.
U.S. troops are having a hard time protecting themselves. Al-Anbar has seen some of the strongest resistance against U.S. occupation forces. Security operations in the area, including two massive assaults on Fallujah, have done nothing to calm down the uprising. U.S. bases near Fallujah regularly face mortar attacks.