Washington, Oct. 24 -- President Donald Trump is claiming "big success" along the Turkey-Syria border as the United States winds down its military commitment in Syria, where a civil war has raged for eight years.

Trump said in a tweet that he planned a late Wednesday morning statement from the White House where he would discuss the cease-fire between Turkey and American-allied Syrian Kurdish forces. According to Trump, the Kurds are "safe," and captured Islamic State fighters are "secured" in detention centers.

Trump this month ordered the bulk of the approximately 1,000 U.S. troops in Syria to withdraw after Turkey's president, Recep Tayipp Erdogan, told Trump in a phone call that Turkish forces were readying to invade northeastern Syr...