Which battle is considered the first of the American Revolution where colonial forces were initially forced to retreat but later regrouped?

The Battle of Lexington and Concord is often considered the first encounter of the American Revolution because it marked the initial armed conflict between colonial militia and British troops. On April 19, 1775, British troops were dispatched to confiscate colonial weapons stored in Concord. The confrontation began in Lexington, where colonial forces were outmanned and forced to retreat against the advancing British. However, this retreat did not signify defeat; instead, many colonial troops regrouped and later confronted the British again in Concord, where they successfully pushed the British forces back toward Boston. This moment galvanized colonial resistance and is symbolically important as the "shot heard round the world," initiating the larger conflict for independence.

The other battles listed occurred at different stages of the Revolutionary War or were not the first engagements, making this choice significant as the starting point of the revolution.