 Continuing her escort service, she was assigned to the European patrol force in 1918.While under the command of Captain Harry G. Hamlet, U.S. Coast Guard, in the Bay of Biscay on 28 April 1919, Marietta rescued 47 crewmen from the patrol vessel which was sinking at sea.This rescue was made extremely difficult and hazardous owing to high seas, which threatened to send the two vessels crashing together.