On April 19, 1775, a group of Massachusetts militiamen converged on the village common of Lexington. Approaching was a British column heading to Concord to seize the arms and munitions stored there. As they approached, the British ordered the colonists to disperse.
No one knows for sure who fired, but the next shot would stand out as the “shot heard ’round the world.” It began the American War of Independence, and its effects are still felt throughout the world.
Attached is the School House Rock video for the shots fired at Lexington. It also gives a succinct synopsis of the war itself.