The event famously referred to as the "Shot Heard 'Round the World" marks the beginning of the American Revolutionary War, specifically during the Battles of Lexington and Concord on April 19, 1775. This phrase signifies the first gunfire that sparked the conflict between British troops and the American colonists, symbolizing resistance against British rule. The incident ignited a series of battles and uprisings across the colonies, ultimately leading to the Declaration of Independence and the formation of a new nation. It encapsulates the struggle for liberty and self-determination of the American people.