James Madison was the first president to use military force to intervene in a foreign conflict when he authorized the invasion of Canada during the War of 1812.

James K. Polk is known for his policy of "Manifest Destiny", which was the belief that the United States was destined to expand its territory across the North American continent.

William Howard Taft is known for his policy of "dollar diplomacy", which was the use of economic power to promote American interests abroad.

Woodrow Wilson is known for his policy of "moral diplomacy", which was the use of moral suasion to promote American interests abroad.

Warren G. Harding is known for his policy of "isolationism", which was the belief that the United States should avoid involvement in foreign affairs.

Franklin D. Roosevelt is known for his policy of "Good Neighbor Policy", which was a policy of non-intervention and cooperation with Latin American countries.

Harry S. Truman is known for his policy of "containment", which was the policy of preventing the spread of communism.

John F. Kennedy is known for his policy of "flexible response", which was the policy of responding to Soviet aggression with a variety of military and diplomatic options.

Richard Nixon is known for his policy of "Vietnamization", which was the policy of gradually withdrawing American troops from Vietnam and turning over the fighting to the South Vietnamese.

Richard Nixon is known for his policy of "détente", which was the policy of easing tensions with the Soviet Union.

Jimmy Carter is known for his policy of "human rights diplomacy", which was the policy of promoting human rights around the world.

Ronald Reagan is known for his policy of "Reagan Doctrine", which was the policy of providing military and financial aid to anti-communist forces around the world.

George H.W. Bush is known for his policy of "new world order", which was the policy of promoting democracy and free trade around the world.

George W. Bush is known for his policy of "preemptive war", which was the policy of attacking potential enemies before they could attack the United States.

Barack Obama is known for his policy of "pivot to Asia", which was the policy of increasing American engagement in the Asia-Pacific region.