The Battle Of Lexington and CONCORD
The Battles of Lexington and Concord were the first military engagements of the American Revolutionary War.
The battles were fought on April 19, 1775 in Middlesex County, Province of Massachusetts Bay, within the towns of Lexington, Concord, Lincoln, Menotomy (present-day Arlington), and Cambridge.
They marked the outbreak of armed conflict between the Kingdom of Great Britain and its Thirteen Colonies in America.
Ralph Waldo Emerson describes the First Shot fired by the Patriots at the North Bridge in his "Concord Hymn" as the "shot heard round the world".
Sauce: https://en.wikipedia.org/wiki/Battles_of_Lexington_and_Concord