What program was designed for boys in Nazi Germany to promote fitness and prepare them for war?

The correct answer is The Hitler Youth. This organization was established to indoctrinate young boys in Nazi ideology, focusing heavily on physical fitness, militaristic training, and loyalty to Adolf Hitler. The Hitler Youth emphasized rigorous physical activities, athletic training, and skills that would prepare boys for military service, reflecting the regime's emphasis on preparing a generation for future warfare and to be obedient soldiers of the Third Reich.

In contrast, the League of German Maidens was specifically for girls and aimed at promoting roles in motherhood and domestic skills, not military preparation. The National Labour Service involved young men in public works to address unemployment, while the German Faith Movement was rooted in religious reform and not related to military fitness or preparation. Thus, the Hitler Youth is distinctly aligned with the aim of preparing boys for war, making it the correct choice.