The British were going to Lexington to arrest Sam Adams and John Hancock, notable men of the Sons of Liberty. After that they would go to Concorde for a drink, no...wait, it was to seize gun powder.
Because Revere, Dawes, and others are good at what they do, Minute Men were ready for the British . The British and the Colonists met at Lexington Green and starred at each other.
Well, evidently the awkwardness of the starring contest proved to be too much and a shot was fired. It was the shot heard around the world.
The American Revolution had begun.
 They got pumped by listening to Eye of the Tiger.