What is OPEC? What were the results of the oil shortages?

The OPEC oil embargo was an event where the 12 countries that made up OPEC stopped selling oil to the United States.  In response to the oil crisis, the United States took steps to become increasingly energy independent.

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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