Theodore Roosevelt fights against the Spanish in Cuba with a volunteer regiment of cavalry, the Rough Riders

Vice President Theodore Roosevelt becomes US president on McKinley's death

Theodore Roosevelt wins the US presidental election in his own right

US president Theodore Roosevelt announces the Roosevelt Corollary to the Monroe Doctrine, in response to crises in Latin America

President Thedore Roosevelt mediates a peace treaty in Portsmouth, New Hampshire, between Russia and Japan

President Roosevelt wins a Nobel Peace Prize for his mediation between Russia and Japan

President Roosevelt sends marines to protect US property during political unrest in Honduras

President Roosevelt sends a fleet of warships on a goodwill tour of the world that also demonstrates US power

William Howard Taft, the Republican candidate, is elected to follow Roosevelt as president

Former president Theodore Roosevelt campaigns against President Taft for the Republican nomination

William Howard Taft defeats Theodore Roosevelt at the Republican convention to win the nomination

Theodore Roosevelt's followers form a rival party to the Republicans, soon to be known as the Bull Moose party

Democrat Woodrow Wilson defeats Republicans Taft and Roosevelt to become the 28th president of the USA

Franklin Delano Roosevelt is paralyzed from the waist down by polio

Presidential candidate F.D. Roosevelt pledges himself at the Democratic convention to deliver 'a new deal for the American people'

The incumbent president, Republican Herbert Hoover, suffers a heavy defeat by Democrat F.D. Roosevelt in the US election

President Roosevelt gives the first of his many 'fireside chats' to the US nation on radio

The Tennessee Valley Authority (TVA) is the largest project launched in the first hundred days of Roosevelt's New Deal

F.D. Roosevelt is elected for a second US presidential term with an increased share of the vote

Congress rejects President Roosevelt's proposed reform of the US Supreme Court, amid furious accusations that he is trying to pack the Court with his nominees

German-born US physicist Albert Einstein writes to President Roosevelt, warning of the potential of an atomic bomb

President Roosevelt, campaigning for a third term, asssures Americans that he will not send their sons to fight in Europe's war

F.D. Roosevelt wins an unprecedented third US presidential term, albeit it with a considerably reduced share of the vote

The US Congress declares war on Japan and President Roosevelt endorses the order

President Roosevelt defines to Congress his concept of Four Freedoms – of speech, of worship, from want, from fear