European demands for war supplies mobilized some sectors of the American economy before the United States entered World War I. Exports increased from $2.1 billion to $2.6 billion annually between 1911 and 1914 and jumped to $5.7 billion in 1916. Changes in the public sector were less dramatic. The government established the National Advisory Committee for Aeronautics, the U.S. Shipping Board, and the Council of National Defense, with an advisory commission, before 1917. But President Woodrow Wilson's policy of neutrality and the powerful peace sentiment in Congress and the rest of the country precluded systematic planning for a war economy.
