BEIRUT — Late in the night on Feb. 2, the news hit: “all communication and supply line[s]” between Turkey and Aleppo had been severed, according to a Elijah Magnier, a renowned Arab war correspondent with Alrai Media Group. It seems to be so: the Syrian army and allied militias, backed by Hezbollah and Russian air power, took control of a tendril of territory that cuts off Aleppo-based rebels from the Turkish border. See the map below. Eastern supply lines for the so-called Islamic State appear to have also been cut.