Harry F. Mahon from Streator, Illinois, takes us on a journey through his World War I diary entries dated April 27, 1918 to June 13, 1919, as a soldier in France covering the march to St. Mihiel and the battle at the Meuse-Argonne Forest. His faith, fortitude, and longing to return home to his family and Louise, the love of his life, motivate him to endure battlefield conflicts, and adversity in the face of death and destruction. Sharing Harry's stories through letters, newspaper articles, and pictures brings to life a man from a prior generation whose story remained a mystery until now.