Final answer:
War propaganda was the type of propaganda directed at young men, using images and messages to encourage their support and enlistment in the military effort.
Step-by-step explanation:
During times of war, the propaganda directed at young men primarily falls under the category of War propaganda. This type of propaganda aims to influence young men to support and join the military effort. It often uses images, messages, and appeals that emphasize patriotism, bravery, and the duty to protect one's country.