Posters were the most important advertising medium for the organizers of 'Völkerschauen' and typically reflected the stereotypes that were most rooted in the minds of the public. Africans were thus often depicted with weapons, as in this poster for the colonial exhibition in Stuttgart in 1928.
'Völkerschau' in Stuttgart in 1928, colour poster, 1928, unknown artist, image source: Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Humanzoogermany.jpg?uselang=de. Creative Commons Attribution ShareAlike 3.0 Germany.