The War Shipping Administration (WSA) was a World War II emergency war agency of the US government, tasked to purchase and operate the civilian shipping tonnage the US needed for fighting the war. Both shipbuilding under the Maritime Commission and ship allocation under the WSA to Army, Navy or civilian needs were closely coordinated though Vice Admiral Emory S. Land who continued as head of the Maritime Commission while also heading the WSA.
A shortage of vessels further complicated by requirements to take vessels out of service for conversion and armament was of concern at the highest levels, including the President. Particular concern that available shipping would not be used effectively led to his establishment immediately on the nation's active entry into the war of the Strategic Shipping Board composed of the Chairman of the Maritime Commission, Army Chief of Staff, Chief of Naval Operations and Mr. Harry Hopkins reporting directly to the President. Differences between the organizations and lack of decisive authority short of the President limited the board's effectiveness. An additional need was an effective routine interaction with the British Ministry of War Transport, already given management of British merchant shipping, for coordination of all Allied merchant shipping. Upon establishment of the WSA the Strategic Shipping Board continued in existence in a much diminished role under the Joint Chiefs of Staff.
The United States Shipping Board (USSB) was established as an emergency agency by the Shipping Act (39 Stat. 729), September 7, 1916. The United States' maritime position had been eroding for decades with some Congressional concern, some remedies actually worsening the situation, with European shipping companies dominating overseas trade and just over 10% of the value of trade carried in U.S. owned ships. The 1916 act was the end result of Congressional efforts to create a board to address the problem dating from 1914. At this time the legislation was not a part of any war effort with specific intent as stated in the act:
A board of five commissioners was to be appointed by the president with confirmation by the United States Senate as the United States Shipping Board (USSB) to acquire and construct suitable vessels and to create corporations under its control to execute the programs. In essence, the USSB was given "complete control over American ships and shipping."