Learn how this heroic group of American Indian men created a secret, unbreakable code and helped the US win major battles during World War II in this new addition to the #1 New York Times bestselling series. By the time the United States joined the Second World War in 1941, the fight against Nazi and Axis powers had already been under way for two years. In order to win the war and protect its soldiers, the US Marines recruited twenty-nine Navajo men to create a secret code that could be used to send military messages quickly and safely across battlefields. In this new book within the #1 New York Times bestelling series, author James Buckley Jr. explains how these brave and intelligent men developed their amazing code, recounts some of their riskiest missions, and discusses how the country treated them before, during, and after the war.