This episode recounts the Battle of Sullivan's Island, where Colonel Moultrie and his Patriot forces defended Fort Sullivan against a British naval attack. Despite being outnumbered and outgunned, the Patriots' strategic defense and the fort's resilient construction led to a surprising victory, inflicting heavy damage on the British fleet and forcing their retreat. This battle marked a significant turning point in the American Revolutionary War, boosting Patriot morale and securing the southern colonies for a time. 

Thanks to Wikipedia and Google Gemini for providing the details to help craft this story.