Admiral Chester Nimitz praised the 'uncommon valor' of the Marines who fought on Iwo Jima, one of World War II's most brutal battles. In 36 grueling days, nearly 7,000 Marines lost their lives and 22,000 were injured. Martha MacCallum traces these men's journey from Pearl Harbor to Iwo Jima, including Harry Gray, a family member. In 'Unknown Valor', she interweaves their personal stories, from Boston to Gulfport, into the broader Pacific conflict narrative. Through jungles, coral reefs, and bloody ridges, these men's path led to Iwo Jima, the Japanese Empire's doorstep. Thoroughly researched, emotionally charged, and revealing, 'Unknown Valor' honors the ordinary Marines who saved the world from tyranny and left lasting impacts on loved ones back home.