The Chairman of the Joint Chiefs of Staff, General Mark Milley, made a surprise visit to Syria on Saturday to assess his forces' mission after nearly eight years of fighting the Islamic State group (ISIS) and to review measures to protect U.S. troops from any attacks. General Milley told accompanying journalists that he believes U.S. forces and their Syrian partners led by the Kurds are making progress in ensuring a lasting defeat of the organization. He emphasized the importance of his forces' mission in Syria, linking it to the security of the United States.