World War II: Franklin D. Roosevelt and Winston Churchill conclude a conference in Casablanca.

Franklin Delano Roosevelt, also known as FDR, was the 32nd president of the United States from 1933 until his death in 1945. He is the longest-serving U.S. president, and the only one to have served more than two terms. His first two terms were centered on combating the Great Depression, while his third and fourth saw him shift his focus to America's involvement in World War II.

Sir Winston Leonard Spencer Churchill was a British statesman, military officer, and writer who was Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. For some 62 of the years between 1900 and 1964, he was a member of parliament (MP) and represented a total of five constituencies over that time. Ideologically an adherent to economic liberalism and imperialism, he was for most of his career a member of the Conservative Party, which he led from 1940 to 1955. He was a member of the Liberal Party from 1904 to 1924.

The Casablanca Conference or Anfa Conference was held in Casablanca, French Morocco, from January 14 to 24, 1943, to plan the Allied European strategy for the next phase of World War II. The main discussions were between US President Franklin Roosevelt and British Prime Minister Winston Churchill. Stalin could not attend. Key decisions included a commitment to demand Axis powers' unconditional surrender; plans for an invasion of Sicily and Italy before the main invasion of France; an intensified strategic bombing campaign against Germany; and approval of a US Navy plan to advance on Japan through the central Pacific and the Philippines. The last item authorized the island-hopping campaign in the Pacific, which shortened the war. Of all the decisions made, the most important was the Allied invasion of Sicily, which Churchill pushed for in part to divert American attention from opening a second front in France in 1943, a move that he feared would result in very high Allied casualties and not be possible until 1944.