On the streets of Paris one day in July 1918, an American doughboy, Sgt. Jimmy Donovan, befriended a stray dog that he named Rags. No longer an unwanted street mutt, Rags became the mascot to the entire First Division of the American Expeditionary Force and a friend to the American troops who had crossed the Atlantic to fight. Rags was more than a scruffy face and a wagging tail, however. The little terrier mix was with the division at the crucial battle of Soissons, at the Saint-Mihiel offensive, and finally in the blood-and-mud bath of the Meuse-Argonne, during which he and his guardian were wounded. Despite being surrounded by distraction and danger, Rags learned to carry messages through gunfire, locate broken communications wire for the Signal Corps to repair, and alert soldiers to incoming shells, saving the lives of hundreds of American soldiers. Through it all, he brought inspiration to men with little to hope for, especially in the bitter last days of the war.