In front of the Old State House, Boston, a circle of cobblestones commemorates the Boston Massacre. At this site, tensions between the colonists and British soldiers erupted into violence on March 5, 1770. A minor dispute between a wigmaker's young apprentice and a British sentry turned into a riot. The relief soldiers that came to the aid of the British were met by an angry crowd of colonists who hurled snowballs, rocks, clubs, and insults. The soldiers fired into the crowd and killed five colonists. Samuel Adams and other patriots called the event a "massacre". In answer to your other questions I have provided references to the Stamp Act and Boston Tea Party, and I trust you now have enough information from which to work out the differences.