shot heard round the world
Meaning
The opening volleys of the Battles of Lexington and Concord during the American Revolution.
A 1951 home run by Bobby Thompson of the New York Giants
(idiomatic) Any cataclysmic event
Source: en.wiktionary.orgExamples
By the rude bridge that arched the flood, Their flag to April's breeze unfurled Here once the embattled farmers stood, And fired the shot heard round the world.
Here once the embattled farmers stood, And fired the shot heard round the world.
By the rude bridge that arched the flood, Their flag to April's breeze unfurl'd; Here once the embattl'd farmers stood, And fired the shot heard round the world.