I've had a little research session that has given me a number of resources to look through. I started off reading bout propaganda, and the reasons behind it, and then went on a little investigative journey.
I started off here:
Propaganda Leaflet Archive
Nazi and East German Propaganda
Techniques are designed to fool the audience. They appeal to emotions rather than reason.
This has told me that propaganda does not have to be as blatant as a swastika. It can be as subtle as a joke.
Chinese Propaganda Posters
Wiki - Nazi Propaganda
Wiki - Japanese WWII Propaganda
Wiki - Soviet WWII Propaganda
Wiki - American WWII Propaganda
Wiki - British WWII Propaganda
Visiting Edward Bernays
History is a Weapon by Edward Bernays
How Americans are propagandized about Afghanistan
Is Government Propaganda Legal?
Manufacturing Consent by Edward S. Herman and Noam Chomsky
The Pacific War Online Encyclopedia: Propaganda
Two Ways of Looking at Propaganda
U.S. Navy Recruiting Poster Archive
U.S. Propaganda in the Middle East - Early Cold War
World War Posters
Sacred Congregation of Propaganda
The Dogma Collection
Wiki - Lie
Wiki - Media Bias
Wiki - Misinformation
Wiki - Music and Political Warfare
Wiki - Political Warfare
Wiki - Psychological Manipulation
Wiki - The Sleeper Effect
Wiki - Cognitive Dissonance
Wiki - Crowd Manipulation
Wiki - Deception
Wiki - Disinformation
These resources are all starting to lead me to the same conclusions - that persuasion is all about weakness.