When Islamic State captured this Mediterranean port last year, fighters tagged walls and buildings with the group’s name. Now, pro-government forces are on the verge of driving the extremists out of Sirte and a new claim to power is spray-painted on homes and blast walls: “The State of Misrata.” Dozens of militias from Misrata, another coastal city about 150 miles to the west, are spearheading the offensive, which is all but over. A wounded Misrata fighter receives help from comrades after being shot in the stomach during… The battle for Sirte is as much about shoring up support for a Western-backed unity government in the capital, Tripoli, as defeating Islamic State. But the boastful graffiti show that victory won’t easily bring together the fragmented country. And even if Islamic State loses in Sirte, militants are already shifting to other cities where Western and Libyan officials fear they could […]