Hamas is a Palestinian Sunni-Islamist fundamentalist organization. It has a social service wing, Dawah, and a military wing, the Izz ad-Din al-Qassam Brigades. It has been the de facto governing authority of the Gaza Strip since its takeover of that area in 2007. During this period it fought several wars with Israel. It is regarded, either in whole or in part, as a terrorist organization by several countries and international organizations, most notably by Israel, the United States and the European Union. Russia and Turkey are among countries who do not regard it so.