SS Lake Arthur (ID-2915) was a Design 1020 cargo ship that served in the Naval Overseas Transportation Service (NOTS) of the United States Navy during World War I.

After her naval service, she operated commercially under a variety of names, before being scuttled in the North Sea with a load of chemical weapons in November 1945.

Ordered by the British government, the ship was laid down by the Detroit Shipbuilding Company of Wyandotte, Michigan, under the name War Plum.

[3] In 1935, Hanseatische Reederei Emil Offen & Co. of Hamburg purchased the ship, and she remained under German control through the end of World War II.

After she was loaded with a cargo of chemical weapons, Sesotris was steered to the Skagerrak Strait in the North Sea and scuttled on 17 November 1945.