1922 USSR formed by Soviet states 1939 - 1945 World War II 1945 Atomic bomb detonated (Hiroshima) 1950 Korean War begins 1964 - 1973 Vietnam War | 1895 Marconi invents wireless telegraphy 1899 Boer War begins 1903 Wright brothers 1st plane flight 1912 Titanic sinks on maiden voyage 1914 - 1918 World War I | 1830 French Revolution 1837 Queen Victoria assumes throne 1854 Crimean War with Russia 1869 Opening of Suez Canal 1871 Franco - Prussian War |
John Hays b. d. | ||||||||
George K. Cogswell b. d. | ||||||||
Grace Cogswell b.1890 d. | Thomas J. O'Leary b.1835 Milan, Ohio d.1903 Hutchinson, Kansas | |||||||
Eliza J. O'Leary b.1870 d.1927 | Angeline Boyle b.1846 Ohio d.1914 Hutchinson, Kansas | |||||||