In August 1918 a Massachusetts-born woman named Margaret Hall boarded a transport ship in New York City that would take her across the Atlantic to work with the American Red Cross in France, then in the devastating grips of the First World War. Working at a canteen at a railroad junction close to the Western Front, Hall aided both Allied and German soldiers. While there she was regularly forced to seek shelter from German bombardments. After the Armistice, Hall explored the destruction of the surrounding region; her diary entries, letters, and photos reveal a world of ruins and human...