Lillian Wald
| 1895 | Röntgen discovers X-rays |
| 1897 | Clara Barton moves to Glen Echo; William McKinley becomes President, is shot September 6, 1901, dies September 14, and is succeeded by Theodore Roosevelt |
| 1898 | Clara Barton takes the Red Cross to the front lines during Spanish-American War, which lasts from April 11 to August 13, and publishes The Red Cross in Peace and War |
Red Cross ambulance used during the Spanish-American War
| 1900 | Clara Barton organizes relief for Galveston, Texas, after hurricane and tidal wave, and receives growing criticism for way she is managing the Red Cross; Federal charter granted to the American National Red Cross; Walter Reed discovers that mosquitoes transmit yellow fever |
| 1901 | Jean-Henri Dunant shares, with Frederic Passy, the first Nobel Peace Prize; Marconi transmits first radio signal across the Atlantic |
| 1902 | Arthur Little patents rayon |
| 1903 | Wright brothers fly their first airplane |
The first flight
| 1904 | Clara Barton resigns as president of the American National Red Cross; Mabel Boardman takes control until 1946 |
