Vice President of the United States Theodore Roosevelt utters the famous phrase, "Speak softly and carry a big stick" at the Minnesota State Fair.

President of the United States William McKinley dies after an assassination attempt on September 6, and is succeeded by Theodore Roosevelt.

President Theodore Roosevelt officially renames the "Executive Mansion" to the White House.

US President Theodore Roosevelt delivers a 20,000-word speech to the House of Representatives asking the Congress to curb the power of trusts "within reasonable limits".

The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.

Theodore Roosevelt becomes the first President of the United States to ride in an automobile.

President Theodore Roosevelt sends a radio message to King Edward VII: the first transatlantic radio transmission originating in the United States.

Russo-Japanese War: In New Hampshire, USA, the Treaty of Portsmouth, mediated by US President Theodore Roosevelt, ends the war.

Theodore Roosevelt signs the Antiquities Act into law, authorizing the President to restrict the use of certain parcels of public land with historical or conservation value.

U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.

Theodore Roosevelt is the first sitting President of the United States to make an official trip outside the country. He did so to inspect progress on the Panama Canal.

U.S. President Theodore Roosevelt wins the Nobel Peace Prize, becoming the first American to win a Nobel Prize.

Theodore Roosevelt leaves New York for a post-presidency safari in Africa. The trip is sponsored by the Smithsonian Institution and National Geographic Society.

Theodore Roosevelt made his The Man in the Arena speech.

Former President Theodore Roosevelt becomes the first U.S. president to fly in an airplane. He flew for four minutes with Arch Hoxsey in a plane built by the Wright Brothers at Kinloch Field (Lambert-St. Louis International Airport), St. Louis, Missouri.

While campaigning in Milwaukee, Wisconsin, the former President of the United States, Theodore Roosevelt, is shot and mildly wounded by John Schrank, who was angry with Roosevelt for some reason. With the fresh wound in his chest, and the bullet still within it, Mr. Roosevelt still carries out his scheduled public speech.

US President Bill Clinton awards former President Theodore Roosevelt a posthumous Medal of Honor for his service in the Spanish-American War.