Propaganda posters painted an unrealistic picture of war because they showed Americans as

It was a tool the American used to to paint better pictures about how Americans were felling after the war and painting their opponents badly. They make use of Hollywood activist and musician to promote their agenda.

Explanation:

The propaganda painted or showed Americans as the only set of citizens or people that are full of happiness and not dying as a result of the war. The propaganda painted the opposite of in the war as being devastated and suffering after the war but said nothing bad about the Americans.

i believe it was the shinto