"The Islamic State (IS, aka the Islamic State of Iraq and the Levant, ISIL/ISIS, or the Arabic acronym 'Da'esh') is a transnational Sunni Islamist insurgent and terrorist group that controls large areas of Iraq and Syria, has affiliates in several other countries, has attracted a network of global supporters, and disrupts international security with its campaigns of violence and terrorism. The U.S.-led coalition military campaign against the Islamic State organization in Iraq and Syria has adapted since 2014, as Administration officials and coalition partners have implemented changes in strategy and tactics that have reduced the area controlled by the group and eliminated thousands of its personnel. While the Islamic State has suffered losses on the ground in Iraq, Syria, and Libya, a series of terrorist attacks attributed to the group or to individuals it has inspired have claimed hundreds of lives on four continents since November 2015, including in the United States. A number of countries, including the United States, share an interest in further weakening the group and preventing future attacks. [...] This report provides background on the Islamic State organization, discusses its goals, operations, and affiliates, reviews U.S. legislative and policy debates, and describes select FY2017 legislation from the 114th Congress (H.R. 5325, H.R. 2028, S. 2943, H.R. 5293, and S. 3000)."
CRS Report for Congress, R43612
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html