How did the battles of Lexington and Concord lead many colonists to call for independence from Britain?

At the formal start of the American War for Independence, the Battles of Lexington and Concord led to support for the independence movement for several reasons. For one thing, the Lexington battle demonstrated yet again the British willingness to shed American blood, and this galvanized many Americans. For another thing, the American victory at Concord inspired confidence in many Americans that the British could be beaten in a war.