The British position at Stony Point, New York was really just an attempt to force George Washington out of the mountains and into a pitched battle – one the British could win. The American War of Independence had been going on for years, and by 1778, the British were languishing in New York City. To get things moving, General Sir Henry Clinton sent 8,000 men north to keep the Americans from using King's Ferry to cross the Hudson.
But the Americans weren't stupid. Assaulting a fortified position against overwhelming numbers was a bad call no matter how you try to justify it. So when the British Army left Stony Point with just a fraction of its troops as a garrison, that's when Washington saw his opportunity.
If there's anything Washington excelled at, it was picking his battles.
The setup was so grand and well-made, the British began to refer to their Stony Point position as the "Gibraltar of the West." The fort used two lines of abatements, manned by roughly a third of the total force in each position. To top it all off, an armed sloop, the HMS Vulture, also roamed the Hudson to add to the artillery guns already defending Stony Point. It seemed like a suicide mission.
But when the bulk of the troops left to return to New York, Washington knew his odds were never going to get better than this. The British left only 600-700 troops at Stony Point. The defenses were intimidating, but Washington wasn't fielding militia; he had battle-hardened Continental Soldiers, and a General they called "Mad Anthony" to lead them.
This is not some tiny stream.
The American plan seemed as Mad as Gen. Anthony Wayne. The Americans discovered that the British abatements didn't extend into the river during low tide, so they could just go around the defenses if they timed their attack right. They created a three-pronged plan. Major Hardy Murfree would lead a very loud diversionary attack against the British center and create alarm in the enemy camp. Meanwhile, Gen. Wayne and Col. Richard Butler would assault either side of the defenses and flank the British. But they had to do it in total silence.
They unloaded their muskets and fixed bayonets to surprise the British.
They don't call him "Mad" Anthony Wayne for nothing.
And the British were surprised. They were completely flanked on the sides of their abatements. As Murfree attacked the center, the other Americans completely rolled up the British defenses and cut off the regiments fighting Murfree in the center. They stormed the slopes of Stony Point and completely routed the British positions. They captured almost 500 enemy troops, and stores of food and weapons.
In a dispatch to Washington, Anthony wrote that the fort and its garrison were now theirs and that "Our officers men behaved like men who are determined to be free."