 She participated in training along the Atlantic coast and after American entry into World War I in April 1917, she installed and tended submarine nets in Hampton Roads and at New London, Connecticut.She also trained reserve officers at the Naval Academy.Assigned to temporary duty with the Cruiser and Transport Force, "Dubuque" made three voyages between New York and Halifax, Nova Scotia, as a convoy escort between 6 June and 14 July 1917.