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

			Jacob Boer  b.1883 Polsbroek, Netherlands  d.
	Jan Boer  b. Living  d.
				Jan van Dulken  b.1860 Reeuwijk, Netherlands  d.1915 Reeuwijk, Netherlands
			Cornelia van Dulken  b.1885 Reeuwijk, Netherlands  d.				Jacob Plak  b.1834 Zwammerda, Netherlands  d.1898 Reeuwijk, Netherlands
				Elisabeth Plak  b.1861 Reeuwijk, Netherlands  d.			Trijntje van Vliet  b.1838 Reeuwijk, Netherlands  d.1900 Reeuwijk, Netherlands

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