Answer:
Media Propaganda.
Step-by-step explanation:
Media propaganda was instrumental in shaping pro-war opinion in the United States as the media was used as a tool. To motivate, shift blame, make the government appear totally in control (even when they weren't), etc.
This media propaganda was particularly useful to paint the enemy as totally evil, justifying the war, blaming losses on spies, saboteurs, etc and never allowing the government to take the full blame.