I recently came across this passage of Mein Kampf where Hitler praises the effectiveness of WW1 Allied propaganda over the German people:
At first the claims of the propaganda were so impudent that people thought it insane; later, it got on people's nerves; and in the end, it was believed. After four and a half years, a revolution broke out in Germany; and its slogans originated in the enemy's war propaganda.
I'm assuming this refers to pamphlets delivered by planes and balloons over enemy lines; is that correct?
I searched the web in both English and French, but dedicated sites such as http://propagande1418.free.fr/index2.htm (French) only seem to mention propaganda targeted at domestic audiences.
What sort of ideas were instilled by this propaganda? Do you know of a source where I could find some translated pamphlets?
In my search I came across the stab-in-the-back myth, which makes me wonder if maybe Hitler was overstating the effect of the propaganda because he was influenced by (or wanted to exploit) a popular meme. How accurate was his statement?