Powerful and touching, these are the stories of military working dogs that have played an important role in everything from humanitarian missions to major war battles.

Now reissued with a new cover design and additional content. From World War I on, dogs have served alongside soldiers in history’s most decisive battles. Today’s specially trained war dogs–like the anonymous canine hero that took part in the top-secret mission against Osama bin Laden–are a breed apart, assisting their human friends in everything from landmine and tunnel detection to locating improvised explosive devices. Filled with hundreds of dramatic never-before-seen photos, and information about the animals’ history and training, this new edition features inspiring tales of selfless battlefield service related by the war dogs’ handlers and fellow soldiers. Many dogs have earned recognition for heroism. Others struggle with wounds and post-traumatic stress. Dozens died in the line of duty. These are their unforgettable stories.