against the First Philippine Republic to solidify its control over the newly acquired Philippines. In 1904, Roosevelt committed the United States to building the Panama Canal, creating the Panama Canal Zone. Interventionism found its formal articulation in the 1904 Roosevelt Corollary to the Monroe Doctrine, proclaiming a right for the United States to intervene anywhere in the Americas, a moment that underlined the emergent US regional hegemony. After the outbreak of World War I in 1914, the United States pursued a policy of non-intervention, avoiding conflict while trying to broker a peace. President Woodrow Wilson later argued that the war was so important that the US had to have a voice in the peace conference. The United States was never formally a member of the Allies but entered the war in 1917 as a self-styled "Associated Power". Initially the United States had a small army, but, after the passage of the Selective Service Act, it drafted 2.8 million men, and, by summer 1918, was sending 10,000 fresh soldiers to France every day. The war ended in 1919 with the Treaty of Versailles. The United States then adopted a policy of isolationism, having refused to endorse the 1919 Versailles Treaty or formally enter the League of Nations. During the interwar period, economic protectionism took hold in the United States, particularly as a result of the Smoot–Hawley Tariff Act which is credited by economists with the prolonging and worldwide propagation of the Great Depression. From 1934, trade liberalization began to take place through the Reciprocal Trade Agreements Act. With the onset of World War II in 1939, Congress loosened the Neutrality Acts of 1930s but remained opposed to entering the European war. In 1940, the United States ranked 18th in terms of military power. The Neutrality Patrol had US destroyers fighting at sea, but no state of war had been declared by Congress. American public opinion remained isolationist. The 800,000-member America First Committee vehemently opposed any American intervention in the European conflict, even as the US sold military aid to the United Kingdom and the Soviet Union through the Lend-Lease program. In the 1941 State of the Union address, known as the Four Freedoms speech, President Franklin D. Roosevelt made a break with the tradition of non-interventionism. He outlined the US role in helping allies already engaged in warfare. By August, President Roosevelt and British Prime Minister Winston Churchill had drafted the