The Boy Allies with the Cossacks, Or, A Wild Dash Over the Carpathian Mountains

by Clair Wallace Hayes

1915

Hal and Chester undertake the delivery of a message advancing the allied cause to Grand Duke Nicholas, who is leading Russian armies against the Germans, and subsequently serve with the Russian army.

The Boy Allies with Marshall Foch, Or, The Closing Days of the Great World War

by Clair Wallace Hayes

1919

As World War I draws to a close, two young American officers engage in a series of missions which deal crippling blows to the German enemy.

The Boy Allies with Pershing in France

by Clair Wallace Hayes, Robert L. Drake

1919

Two young officers serving in the American Expeditionary Forces are involved in several dangerous missions on both sides of the Western front during the final days of World War I.