Early humans moved from one location to another in order to hunt migrating herds.
A pandemic<span> is an </span>epidemic (<span>An </span>epidemic<span> is a disease that spreads rapidly among many people in a community at the same time.)</span><span> of </span>infectious disease<span> that has spread through human populations across a large region; for instance multiple </span>continents, or even worldwide.
<span>Korean War...that is your answer
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The French and American Revolutions were similar in that they bought sought to free a general populous from what was determined to be a corrupt and tyrannical monarchical government, however they were different in that after the American Revolution, things were relatively peaceful, whereas after the French Revolution there was a "reign of terror" that was extraordinarily violent.