Weyerhaeuser Steamship Company was a cargo Liner company founded in Tacoma, Washington. Weyerhaeuser Steamship Company was founded by Weyerhaeuser Company in 1933. Weyerhaeuser is one of the largest lumber and paper companies in the United States. First called the Weyerhaeuser Timber Company which started with ships for towing logs in the Northwestern United States. Weyerhaeuser started Weyerhaeuser Timber Company with a ship he acquired in 1892. The log towing ship was a 140-foot sternwheeler built for the partnership, Weyerhaeuser and Denkman Company. In 1923 Weyerhaeuser added to ocean lumber cargo ship the SS Pomona and the SS Hanley. The two ships took lumber to the East Coast. In 1933 F. Weyerhaeuser starts the Weyerhaeuser Steamship Company and moves the headquarters to Newark, New Jersey. At the outbreak of World War II the US government orders the four Weyerhaeuser to take supplies to the British army in Egypt. The next year the other four company's ships are requisitioned by the War Shipping Administration. During World War II the Weyerhaeuser Steamship Company was active in charter shipping with the Maritime Commission and War Shipping Administration. During wartime, the Weyerhaeuser Steamship Company operated Victory ships and Liberty shipss. The ship was run by its crew and the US Navy supplied United States Navy Armed Guards to man the deck guns and radio. The most common armament mounted on these merchant ships were the MK II 20mm Oerlikon autocannon and the 3"/50, 4"/50, and 5"/38 deck guns. In 1942 the SS Potlatch and the SS Heffron were sunk by German U-boats torpedoes. After the war, Weyerhaeuser Steamship Company purchased four Liberty ships for intercoastal shipping service. In 1950 Weyerhaeuser Steamship Company purchases the Pacific Coast Direct Line and moves its headquarter from Newark to San Francisco. In 1962 the Weyerhaeuser Line is started and Weyerhaeuser Steamship becomes a division of Weyerhaeuser Company.

SS Frontenac Victory was a Victory ship built for the United States War Shipping Administration late in World War II under the Emergency Shipbuilding program. It saw service in the European Theater of Operations in the Atlantic Ocean during 1945, and in the immediate post-war period. SS Frontenac Victory was part of the series of Victory ships named after cities; this particular ship was named after the city of Frontenac, Missouri. It was a type VC2-S-AP2/WSAT cargo ship with the U.S. Maritime Commission (MARCOM), "Victory" (MCV) hull number 625, shipyard number 1597, and built by Bethlehem Shipbuilding Corporation in Baltimore, Maryland.