Answer:
Propaganda was important to the United States War Effort because it was a tool to increase support for America and America's allies and hatred for the enemies.
Step-by-step explanation:
Campaigns were used to promote factory work efficiency, deflect criticism of allies, and to spread rumors about the enemies. Media was used to advertise things such as joining the military and using people's consumption of entertainment to their advantage by inserting propaganda in comics and radio. An example of media being used is President Roosevelt's fireside charts. Fireside charts was a series of night-time radio addresses given by Roosevelt where he could talk about whatever he wanted, which he used to spread rumors to the American People.