Between April and October 1918 Calamares made five voyages to France as her part of the Navy's vast responsibility to transport to the American Expeditionary Force reinforcements, munitions, and supplies.

Calamares carried perishable provisions on three voyages to France from 8 November 1918 to 12 March 1919, and then was reassigned to the Cruiser and Transport Force for service as a troop carrier.

In June, she sailed to Auckland, New Zealand, for fresh stores, and from Noumea Calamares made a cruise of the South Pacific bases, supplying navy and army forces ashore.

Returning to San Francisco in August, the storeship operated between the west coast and Pearl Harbor until 22 November, when she sailed for the South Pacific again, carrying Christmas delicacies as well as the usual stores for ships based on Funafuti, Ellice Islands, and Nouméa.

Calamares' crew members were authorized the following medals: This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.