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Roosevelt Corollary
The Roosevelt Corollary declared a right for the US to intervene to stabilize weak countries in Latin America. It also weakened European influence in Latin America and established US regional control. This changed US foreign policy as it gave reasoning to US intervention in Latin America. -
Panama Canal
The Panama Canal symbolized US economic power in Latin America and was, at the time, seen as a major foreign policy achievement. This change in foreign policy helped not only economically, but advanced American power in Latin America. -
Fourteen Points
Wilson's Fourteen Points included the outlining of the League of Nations, which the US did not want to enter. This lead to American foreign policy change as it made the US more isolationist, and Americans did not want to engage in another international war. -
Quota Act
The Quota Act of 1921 placed a quota on the number of European immigrants who could come to America each year. It was set at 3% of the people of their nationality who had been living in the United States in 1910. This foreign policy change decreased the number of immigrants living in the US. -
Nine Power Treaty
The Nine Power Treaty was signed by the US and many other major countries and established China as having an Open Door Policy. This changed American foreign policy as the US and other countries were now forced to respect others' interests in the Pacific. -
Fordney-McCumber Tariff Law
The Fordney-McCumber Tariff Law of 1922 raised the tariff from 27% to 35%. This law caused the US and European countries to start a “tariff war” in which each country attempted to raise the tariff higher than the other. This foreign policy change dramatically slowed down global trade and caused America to be oversaturated with its own goods. -
Five Power Treaty
The Five-Power Naval Treaty of 1922 limited the construction of certain types of large naval ships, and it applied ratio limits to the number of ships a country could build (ex: Japan could build 3/5 as many ships as America). It also stated that the British and Americans would refrain from fortifying their Far Eastern possessions, including the Philippines. This changed US foreign policy to be more isolationist. -
Dawes Plan
The Dawes Plan was created to facilitate trade with Europe to protect the American economy. This changed foreign policy as the US and other countries tried to aid in repairing the German economy following WWI. -
Kellogg Briand Pact
The Kellogg Briand Pact "outlawed" war by having major countries agree to not engage in offensive war against each other. This changed American foreign policy to be less inclined to intervene in international affairs. -
Clark Memorandum
The Clark Memorandum stated that the US should not intervene in Latin American affairs and paved the way for the "Good Neighbor" Policy in Latin America. This greatly changed foreign policy regarding Latin America as it improved opportunities for good trade relationships. -
Hawley–Smoot Tariff
The Hawley–Smoot Tariff changed American foreign policy as it promoted isolationism through raising the tariff nearly 60%. -
Stimson Doctrine
The Stimson Doctrine declared that the United States would not recognize any territory acquired by force following the Japanese imperialists invasion of the Chinese province of Manchuria in 1931. This changed US foreign policy towards Japan and China, as the US wanted to solve the Manchuria crisis and maintain the Open Door Policy. -
Neutrality Acts of 1930s
The Neutrality Acts of the 1930s (1935-1939) were created to prevent US involvement in future wars. American businesses were prevented from loaning money to, selling war material to, or carrying goods aboard American ships to nations at war. This changed foreign policy and made Americans determined to stay out of another foreign war. -
Lend Lease Act
The Lend Lease Act eliminated the cash-carry requirements and allowed the US to send supplies to countries that were the victim of aggression. This created the US to not be truly neutral and was considered an economic declaration of war. This changed foreign policy greatly as the US was now able to send supplies to the Allied countries. -
Atlantic Charter
The Atlantic Charter defined America's connection to the idea of self-determination and freedom, and also declared that aggressor nations must be eliminated. This greatly changed US foreign policy as the US was supposed to be neutral, but had released its plans for war.
