American Revolutionary War: The war begins during the Battles of Lexington and Concord with a victory of American minutemen and other militia over British forces, later referred to as the "shot heard round the world".

The American Revolutionary War, also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continental Army and commanded by George Washington defeated the British Army. The conflict was fought in North America, the Caribbean, and the Atlantic Ocean. The war's outcome seemed uncertain for most of the war. But Washington and the Continental Army's decisive victory in the Siege of Yorktown in 1781 led King George III and the Kingdom of Great Britain to negotiate an end to the war in the Treaty of Paris two years later, in 1783, in which the British monarchy acknowledged the independence of the Thirteen Colonies, leading to the establishment of the United States as an independent and sovereign nation.

The Battles of Lexington and Concord on April 19, 1775, were the first major military actions between the British Army and Patriot militias from British America's Thirteen Colonies during the American Revolutionary War. The opposing forces fought day-long running battles in Middlesex County in the Province of Massachusetts Bay, in the towns of Lexington, Concord, Lincoln, Menotomy, and Cambridge.

Minutemen were members of the organized New England colonial militia companies trained in weaponry, tactics, and military strategies during the American Revolutionary War. They were known for being ready at a minute's notice, hence the name. Minutemen provided a highly mobile, rapidly deployed force that enabled the colonies to respond immediately to military threats. They were an evolution from the prior colonial rapid-response units.

A militia is a military or paramilitary force that comprises civilian members, as opposed to a professional standing army of regular, full-time military personnel. Militias may be raised in times of need to support regular troops or serve as a pool of available manpower for regular forces to draw from.