The U.S. Navy commandeered her on 21 March 1918 for World War I service, assigned her the registry Identification Number (Id. No.) 1298, outfitted her for service as a troop transport at Mare Island Navy Yard at Vallejo, California, and commissioned her as USS Harvard (ID-1298) on 9 April 1918. On 11 April 1918 she was renamed USS Charles (ID-1298). The Navy later (on 28 August 1918) purchased Charles outright from her owners.
Departing Mare Island, Charles reached Hampton Roads, Virginia, on 26 June 1918. There she loaded troops and departed Newport News, Virginia, for Brest, France, on 10 July 1918. She arrived at Brest on 21 July 1918.
On 27 July 1918, Charles reported at Southampton, England, for duty as a ferry for troops crossing the English Channel. She made about 60 voyages between Southampton and Le Havre or Boulogne, France, carrying troops of all nationalities bound for action at the front during the war or for occupation duty after it ended, until 5 May 1919.
Reverting to her original name, Charles was renamed USS Harvard on 29 July 1920. She was considered for conversion into a seaplane tender, but this was never carried out, and instead she was sold on 14 October 1920.
She and her sister Yale were modernized for $8,000,000, before inaugurating the new overnight passenger and cargo ferry service for the Los Angeles Steamship Company between Los Angeles and San Francisco in 1921 as high-speed luxury liners.
Wreck
Harvard resumed commercial service, but she was stranded and wrecked at Point Arguello, California, on 30 May 1931.[5]
^The statement in her NavSource Online entry at http://www.navsource.org/archives/12/171298.htm that the year of her stranding was 30 May 1923 appears to be a typographical error induced by the mention at her Naval Historical Center Online Library of Selected Images entry (at http://www.history.navy.mil/photos/sh-usn/usnsh-c/id1298.htm) that her wreck occurred near the spot were seven U.S. Navy destroyers had been wrecked on 8 September 1923