George Washington's secret six : the spy ring that saved the American revolution
When General George Washington beat a hasty retreat from New York City in August 1776, many thought the American Revolution might soon be over. Instead, Washington rallied -- thanks in large part to a little-known, top-secret group called the Culper Spy Ring. Washington realized that he couldn't beat the British with military might, so he recruited a sophisticated and deeply secretive intelligence network to infiltrate New York. So carefully guar...