Answer:
Hundreds of British troops marched from Boston to nearby Concord in order to seize an arms cache.
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The result was the 12th Amendment, approved in Congress on December 9, 1803, and ratified on June 15, 1804, in time for the new process to be in place for the 1804 election, With the 12th, Electors are directed to vote for a President and for a Vice President rather than for two choices for President.