"Greer"s shake down took her to Azores, from which she rendezvoused with , carrying President Woodrow Wilson home from the Versailles Peace Conference, and escorted her to the United States. After exercises in coastal waters, "Greer" was assigned to Trepassey Bay, Newfoundland, for duties during a transatlantic flight by four Navy seaplanes, one of which, NC-4, safely completed the historic undertaking. After further training exercises and a European cruise, "Greer" was assigned to the Pacific Fleet, reaching San Francisco 18 November 1919.