In the American Revolutionary War, which 1775 engagement began the major fighting remembered by America250?

The Battles of Lexington and Concord began the major fighting of the American Revolutionary War in April 1775.

On April 19, British troops marched from Boston toward Concord, Massachusetts, to seize colonial military supplies. At Lexington, British regulars and local militia exchanged the first shots. The British continued to Concord, where colonial forces confronted them at the Old North Bridge.

The British then withdrew toward Boston while militia units attacked along the return route. The clashes became the first major military actions between the British Army and Patriot militias from the Thirteen Colonies. The fighting also helped trigger the Siege of Boston.

The event is often associated with the phrase “the shot heard round the world,” although the exact identity of the person who fired first remains unknown. Lexington was a brief skirmish, while Concord and the long British retreat involved larger engagements.