The Kansas-Nebraska Act was controversial because it left the issue of whether slavery should be allowed to a popular vote, which brought about a series of violent confrontations called bleeding Kansas.
Explanation:
On March 5, 1770 the dreadful day came. A mob of people went in front of the Customs Office in Boston Massachusetts and started to throw stuff and give insults at the soldiers. As a result to this so-called harassment the soldiers fired on the crowd. The first to die was an African-Amercan man named Crispus Attucks.
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