Kurdish forces began pulling out of a 20-mile buffer zone in northern Syria as fighting eased on Friday, Turkish and American officials said, signaling that a cease-fire announced a day before by Vice President Mike Pence between Turkish and Kurdish forces was going into force. Early Friday, the Kurdish leadership in northern Syria accused the Turkish military and its proxies of violating the terms of the truce, but President Recep Tayyip Erdogan of Turkey denied that any fighting was continuing. Mr. Erdogan said his military commander had reported everything was going as planned. The onus, he added, remained with the United States to ensure the Kurdish militias withdrew within the agreed five-day period. “If the United States can keep its promise, in 120 hours the issue of the safe zone will be resolved,” he told Western reporters at a news briefing […]