The event considered the start of the American Revolution is the Battles of Lexington and Concord, which took place on April 19, 1775. These skirmishes marked the beginning of armed conflict between British troops and American colonial militia. Tensions had been escalating due to British taxation and oppressive measures, leading to a significant buildup of colonial resentment. The "shot heard 'round the world" signifies the first exchange of gunfire, symbolizing the colonies' resolve to fight for their rights and independence. This confrontation set the stage for full-scale rebellion against British rule, ultimately leading to the American Revolutionary War.