I was browsing though a collection of propaganda posters from World War II, and noticed a huge difference from the way the "War on Terror" is being marketed.
Whereas today the war is sanitized, with the government prohibiting even pictures of coffins, the WWII posters don't shy away from images of American soldiers dead and injured — and placing the blame squarely on the American public. For instance:
Other big themes: America needs women to work, Don't throw away your tires/wood/scrap metal and Don't pay more than the ceiling prices. Imagine that, an America where the government actually tried to prohibit price gouging...
Addendum: from another collection: Venereal Disease helps the enemy!