Americans love to celebrate Cinco de Mayo. It's hard to imagine there's anyone who doesn't love to sip margaritas or Coronas at their favorite Mexican restaurant. Some of us probably even partake in a little dancing. However, for many Americans, the origin of this celebration of Mexican culture is a little unclear.  Cinco de Mayo: Historical Significance and Misconceptions Some think it has to do with the Mexican-American War of 1846-1848, and they're not entirely wrong—it was a display...