28 Jul 1914—11 Nov 1918: World War I World War I (WWI or WW1), also known as the First World War or the Great War, was a global war centered in Europe that began on 28 July 1914 and lasted until 11 November 1918.
2
1929
1929—1939: The Great Depression The Great Depression was a severe worldwide economic depression in the 1930s. The timing of the Great Depression varied across nations; however, in most countries it started in 1929 and lasted until the late 1930s.
Elihu Kisor Ball Genealogy
1647 - 1675 (28 years)