From our Revolution to the Civil War, to the Great Depression, to the Civil Rights movement, our people have always mustered the determination to
construct from these crises the pillars of our history.

this isn't a question and if you're going to list things be kind and use commas.

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

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this is a good question! i'll do some research and come back when i have the answer!