American Revolution
Kings Mountain -
Theodore Roosevelt wrote of Kings Mountain, "This brilliant victory marked the turning point of the American Revolution." Thomas Jefferson called it, "The turn of the tide of success." Herbert Hoover's address at Kings Mountain included, "This is a place of inspiring memories. Here less than a thousand men, inspired by the urge of freedom, defeated a superior force intrenched in this strategic position. This small band of patriots turned back a dangerous invasion well designed to separate and dismember the united Colonies. It was a little army and a little battle, but it was of mighty portent. History has done scant justice to its significance, which rightly should place it beside Lexington, Bunker Hill, Trenton and Yorktown."
Numerous "Overmountain Men" marched over mountains in North Carolina and what is now Tennessee to the Kings Mountain site - named after King's Settlement and the King family (King's Creek). Many of those at the battle were American settlers of largely Scotch-Irish descent who had settled west of, or "over," the Appalachians, and were thus known as the "Overmountain Men."
These Patriots (Whigs) were entirely volunteer forces who fought under men that they chose to follow: William Campbell, John Sevier, Frederick Hambright (Hambrecht), Joseph McDowell, Benjamin Cleveland, James Williams, Zachariah Isbill, John McKissack, Isaac Shelby and James Johnston (Colonel) who was in command of the rear guard, led their militia units as Colonels, while Captain Joseph Winston and Edward Lacey commanded the other mostly autonomous units. Captain Espey and Captain John Mattocks were both killed during the battle while leading their units. Major William Chronicle was also killed leading his men during hand to hand combat. Colonel Frederick Hambright (actual name was Hambrecht) took over and his unit, the South Fork Boys took the most extreme punishment and casualties of any unit assembled. Colonel Hambright was shot atop his horse, but refused to get down despite being clearly visible riding around, while his boot filled with his blood. Three holes were found in his hat and he later refused medical treatment until all others had been attended to.
Atop King's Mountain, the British commander would later invoke God's name and state, "not even God himself can take me off of this mountain."
These patriots simply chopped up the Redcoats and Loyalists so badly, it put the fear of God into every English commander.
Runner up is Cowpens - This battle broke the back of General Cornwallis and Tarleton. It lead directly to Yorktown.