Can you briefly talk about world war

World War I (often abbreviated as WWI or WW1), also known as the First World War or the Great War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918, The Wars were violent my great grandpa fought in the WW2 and he told a story that was past down 2 generations he told me everything or the story did it was sad he died in war and he will always be remembered not only in history but in my heart