The U.S. Navy acquired Munplace from Munson for World War I service on 31 August 1918, assigned her the naval registry Identification Number (Id.

Assigned to the Naval Overseas Transportation Service (NOTS), Munplace was loaded with a cargo of United States Army supplies, made a transatlantic crossing to France in convoy, and arrived at Rochefort, France, on 4 October 1918.

In December 1918, Munplace departed Norfolk and delivered another U.S. Army cargo to La Pallice.

She then returned to the United States, arriving at Newport News in January 1919 On 15 February 1919 Munplace was decommissioned and delivered to the United States Shipping Board for simultaneous return to Munson Steamship Line.

She returned to mercantile service as SS Munplace, remaining in commercial use until she was scrapped at Baltimore, Maryland, in 1939.