![]() | 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 |
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![]() | ![]() | Ludwig Franz Roehmann b. d. | ||||||
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![]() | ![]() | ![]() | ![]() | ![]() | Louis Sachs b.1820 d.1868 Breslau, Poland | |||
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![]() | ![]() | ![]() | Bernhard Sachs b.1862 d.1928 | ![]() | Auguste Bielschowsky b.1829 d.1877 | ![]() | ||
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![]() | ![]() | Gabriele Sachs b.1901 d. | ![]() | ![]() | Max Weigert b.1843 d.1906 Breslau, Poland | ![]() | ||
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![]() | ![]() | ![]() | Margarethe Weigert b.1873 d.1932 Berlin, Germany | ![]() | Sophie Mugdan b.1851 d.1927 Breslau, Poland | |||
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