The only discordant element was Nick Rabig, born in America but of German parents, who had been with them in the same firm in Camport, and had made himself thoroughly disliked because of his bullying disposition and pro-German sentiments. He and Frank had been more than once on the point of blows, and finally, after Rabig had been caught in the draft and placed in the Thirty-seventh, Frank gave him the thrashing that he richly deserved. How the Army Boys went through their period of training; how they sailed for Europe and narrowly escaped being torpedoed by a submarine, what exciting adventures they met with in their first contact with the enemy--these things are told in the first volume of this series, entitled: “Army Boys in France; Or, From Training Camp to Trenches.” Once in the battle zone, thrilling experiences came thick and fast. The boys were not confined in their activities to the trenches, for the operations soon developed into open fighting. They were caught in a swirl of the fighting, pursued by Uhlan cavalry, compelled to leap from a broken bridge and finally captured by the Germans. From this captivity they were rescued by their aviator friend, Dick Lever, and carried back to their lines in his aeroplane. Frank had some encouraging news about his mother’s property from a Colonel Pavet whose life he had saved on the battlefield. How rapidly the boys developed into veteran soldiers is told in the second volume of the series, entitled: “Army Boys in the French Trenches; Or, Hand to Hand Fights with the Enemy.” The great German drive was now preparing and the enemy in his first successes drove the Allies back and threatened to seize Paris and the Channel Ports. The old Thirty-seventh was thrown into the breach with the other American forces and did valiant work in holding the Germans back. Tom was captured and had a series of stirring adventures before he rejoined his comrades. Nick Rabig, who had been under suspicion, from the start, was unmasked as a traitor. The boys had many hairbreadth escapes in desperate fighting, as will be seen from the third volume of the series, entitled: “Army Boys on the Firing Line; Or, Holding Back the German Drive.”