 During her second such trip, while in convoy on the foggy night of 22 May 1918, "Wabash" collided with the U.S. Navy patrol vessel , sinking her.During the rest of the First World War, and in the months following the 11 November 1918 Armistice, she completed three more round-trip Atlantic Ocean crossings

Decommissioned on 21 April 1919, the freighter was returned to the U.S.Shipping Board.