The two recent US air strikes on a Syrian convoy heading to the al-Tanf military base in the southern Syrian Desert a few miles from the Jordanian-Syrian border have major strategic importance. The attack signaled for the first time since the Syrian civil war broke out in 2011 that the US would not countenance the reemergence of the Iranian-controlled Shiite crescent that Iran had created through Teheran, Baghdad, Damascus, and Beirut after the US exited Iraq in 2010.