The American Revolutionary war started on April 19, 1775. The Battles of Lexington and Concord are the Battles that triggered the American Revolutionary war. Rebel leaders Samuel Adams and John Hancock were captured by the British Army, but capturing the rebel leaders was not their only mission, they also wanted to destroy the American store of weapons and ammunition in Concord. Samuel Adams and John Hancock escaped, and the local militia was able to hide a lot of their ammunition and weapons. The British marched to Concord after the Americans fled Lexington. They encountered little resistance when they first got to Concord and they began their search for the Militia’s hidden stash of weapons and munitions. Having retreated from Concord, the Americans sat along the North Bridge, observing the British from the other side of the Bridge. In the course of time, the Americans waited for more and more militiamen to arrive, strengthening their forces further and further as they did so. As soon as the British decided to retreat, they began the long march that would take them back to the city of Boston. It was during the British when they reached Boston. There were 73 men lost by the British when they reached Boston. There were 49 Americans who were killed and 41 who were wounded during the battles. The American Revolution had officially begun because of these battles. Shots had been fired, thousands of militiamen surrounded Boston, the Americans gained courage because they felt they pushed back the British and therefore they united and fought.