“Carefully integrated into a larger strategy, a small, nimble U.S. force presence offers a powerful obstacle to two threats—a regenerated Islamic State, and Iran's effort to use Syria as a power projection platform in the heart of the Arab Middle East and against Israel.” “Iranian aims conflict squarely with Israeli security, and the IDF has repeatedly taken action to blunt Syria's transformation into a platform for attacks against the Jewish state.” “Second, work out an understanding with Turkey in the north that would permit the United States and its allies to exercise control over 40 percent of Syria's territory, including the country's most resource-rich tier.” (thanks Amir)