Herbert Clark Hoover was an American politician, businessman, and engineer, who served as the 31st president of the United States from 1929 to 1933. A member of the Republican Party, he held office during the onset of the Great Depression.

Franklin Delano Roosevelt, often referred to by his initials FDR, was an American politician who served as the 32nd president of the United States from 1933 until his death in 1945. A member of the Democratic Party, he won a record four presidential elections and became a central figure in world events during the first half of the 20th century.

Harry S. Truman was the 33rd president of the United States, serving from 1945 to 1953, succeeding upon the death of Franklin D. Roosevelt after serving as the 34th vice president. He implemented the Marshall Plan to rebuild the economy of Western Europe, and established the Truman Doctrine and NATO to contain Communist expansion.

Dwight David "Ike" Eisenhower was an American military officer and politician who served as the 34th president of the United States from 1953 to 1961. During World War II, he became a five-star general in the Army and served as Supreme Commander of the Allied Expeditionary Force in Europe.

John Fitzgerald Kennedy, often referred to by his initials JFK, was an American politician who served as the 35th president of the United States from 1961 until his assassination in 1963. Kennedy served at the height of the Cold War, and the majority of his work as president concerned relations with the Soviet Union and Cuba.