 | 1950 Korean War begins 1964 - 1973 Vietnam War 1969 Armstrong first person on moon 1986 Nuclear disaster at Chernobyl 1989 Berlin wall falls | 1912 Titanic sinks on maiden voyage 1914 - 1918 World War I 1922 USSR formed by Soviet states 1939 - 1945 World War II 1945 Atomic bomb detonated (Hiroshima) | 1869 Opening of Suez Canal 1871 Franco - Prussian War 1895 Marconi invents wireless telegraphy 1899 Boer War begins 1903 Wright brothers 1st plane flight |
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| | |  |  | Willem Plak b.1867 Reeuwijk, Netherlands d.1907 Reeuwijk, Netherlands |  | ||
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| | | Jan Plak b.1901 Reeuwijk, Netherlands d.1997 | | Adriana Verweij b.1876 Reeuwijk, Netherlands d.1955 Reeuwijk, Netherlands | |||
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|  | Jan Plak b. Living d. | ||||||
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 | Jan Plak b. Living d. |  |  | Maria Hendrika Elisabeth van Dam b.1908 Stolwijk, Netherlands d.1997 Gouda, Netherlands | ||||
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| Crijn Cornelis Plak b. Living d. | | | |||||
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|  | Cornelia Vermeulen b. Living d. | ||||||
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