Congressional Research Service Summary The Islamic State is a transnational Sunni Islamist insurgent and terrorist group that has expanded its control over areas of parts of Iraq and Syria since 2013. It threatens the governments of both countries and potentially several other countries in the region, and has drawn a military response from the international community. There is debate over the degree to which the Islamic State organization might represent a direct terrorist threat to the U.S. homeland or to U.S. facilities and personnel in the region.