The phrase comes from the opening stanza of Ralph Waldo Emerson’s “Concord Hymn” (1837) and refers to the first shot of the American Revolution at the Old North Bridge in Concord, Massachusetts, where the first British soldiers fell in the battles of Lexington and Concord on April 19, 1775. Historically, no single shot can be cited as the first shot of the battle or the war. Shots were fired earlier that day at Lexington, Massachusetts, where eight Americans were killed and a British soldier was slightly wounded, but accounts of that event are confusing and contradictory.[1] The North Bridge skirmish did see the first shots by Americans acting under orders, the first organized volley by Americans, the first British fatalities, and the first British retreat.