Upon the declaration of war with Germany, SS Vogesen was seized by Customs and Navy officials at Pensacola, Florida, and was renamed Quincy 4 June 1917.

Quincy departed 21 July for Brest, France with a cargo of lumber, cement, and airplanes, and returned to Philadelphia, Pennsylvania, 26 September for a short refit.

On her third eastward crossing she left Galveston, Texas, 1 November, bound for Genoa, Italy with a cargo of aviation material.

Quincy subsequently carried cargo between U.S. east coast ports and visited Guantánamo Bay and St. Thomas, Virgin Islands.

She was declared missing after sailing from Seattle for Hong Kong on October 24, 1937 with a cargo of sulfur that was believed to be headed for China for use in its munitions industry.