was grounded in adherence to Constitutional principles, most of the sentiment bore a reassertion of nativist and inward-looking policy. The United States acted independently to become a major player in the 1920s in international negotiations and treaties. The Harding Administration achieved naval disarmament among the major powers through the Washington Naval Conference in 1921–22. The Dawes Plan refinanced war debts and helped restore prosperity to Germany. In August 1928, fifteen nations signed the Kellogg–Briand Pact, brainchild of American Secretary of State Frank Kellogg and French Foreign Minister Aristide Briand. This pact that was said to have outlawed war and showed the United States commitment to international peace had its semantic flaws. For example, it did not hold the United States to the conditions of any existing treaties, it still allowed European nations the right to self-defense, and it stated that if one nation broke the Pact, it would be up to the other signatories to enforce it. The Kellogg–Briand Pact was more of a sign of good intentions on the part of the US, rather than a legitimate step towards the sustenance of world peace. The economic depression that ensued after the Crash of 1929, also continued to abet non-intervention. The attention of the country focused mostly on addressing the problems of the national economy. The rise of aggressive imperialist policies by Fascist Italy and the Empire of Japan led to conflicts such as the Italian conquest of Ethiopia and the Japanese invasion of Manchuria. These events led to ineffectual condemnations by the League of Nations. Official American response was muted. America also did not take sides in the brutal Spanish Civil War and withdrew its troops from Haiti with the inauguration of the Good Neighbor Policy in 1934. Non-interventionism before entering World War II As Europe moved closer to war in the late 1930s, the United States Congress continued to demand American neutrality. Between 1936 and 1937, much to the dismay of President Franklin D. Roosevelt, Congress passed the Neutrality Acts. For example, in the final Neutrality Act, Americans could not sail on ships flying the flag of a belligerent nation or trade arms with warring nations. Such activities had played a role in American entrance into World War I. On 1 September 1939, Germany invaded Poland, marking the start of World War II, and the United Kingdom and France subsequently declared war on Germany. In an address to