After having been trained at the camp, and cementing their friendship in many ways, the "five Brothers" as they called themselves, were sent across. In the second book of the series, "The Khaki Boys On the Way," we find our youthful heroes sailing for France after a series of adventures, one a startling one, at Camp Marvin. This adventure had to do with the blowing up of a bridge, and Jimmy Blaise had a fight with a spy--a fight that came near being Jimmy's last.
In this second book will also be found an account of the trip of the Khaki Boys to the coast, where they boarded a transport for France. If they expected to get across safely, as many thousands did, they were disappointed, for they were attacked by a U-Boat. Many on board the transport _Columbia_ perished, but the five Brothers were saved, and, after a time spent in a rest camp in England, they crossed the channel to France.
The third volume, called "The Khaki Boys at the Front," tells in detail some of their exciting experiences. The quintette were given leave to go from their camp to Paris, and in that beautiful city they met some other friends, the Twinkle Twins, otherwise John and Gerald Twinkleton, who had joined the aviation branch of the service. This was natural, since their cousin, Emile Voissard, was one of the most daring of the airmen, meriting the name "Flying Terror of France."
In that book, too, you may read of how Franz Schnitzel, by his knowledge of the German tongue, was able to give advance notice of a raid he overheard the Huns planning. The raid was a failure from the German standpoint, but during it some of our Khaki Boys were wounded.
Adventure followed adventure, but in one "grand" one, as a Frenchman would call it, Jimmy, on guard when Voissard's aëroplane was on the ground, temporarily disabled, stood off an attack of Germans and among others he killed Adolph von Kreitzen, known as the "tiger man." On his head the French government had set a price of five thousand francs, or about a thousand dollars, and of course Jimmy won this.
So now, in the opening of this present story, we find our five Khaki Boys still together after many strenuous happenings. They had been wounded but were now recovered and they had fought valiantly.