- 1901 William McKinley takes oath on Mar 4 to begin second term of Presidency.
- 1901 McKinley assassinated Sep 14, Theodore Roosevelt becomes 26th President.
- 1903 Wright brothers make first powered flight, Kitty Hawk, NC Dec 17.
- 1903 Great automobile race from New York City to Pittsburgh takes eight days.
- 1904 Nez Perce Chief Joseph dies in exile in Washington state.
- 1905 Theodore Roosevelt takes oath on March 4; begins 2nd term.
- 1906 Great San Francisco earthquake April 18 kills over 500 people.
- 1907 Oklahoma admitted as 46th state on Nov 16.
- 1908 First Model T rolls off the Ford assembly line.
- 1909 William H. Taft takes oath on March 4; becomes 27th President.
- 1909 Great White Fleet of 16 battleships completes trip around the world.
- 1909 Robert E. Peary (a white) & Matthew A. Henson (a black) reach North Pole.
- 1909 NAACP founded by W. E. B. DuBois.
- 1910 Boy Scouts of America founded, Feb 8.