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"DESTROY THIS MAD BRUTE" is the caption of this World War I propaganda poster for enlistment in the US Army. A dribbling, ape-like German wielding a club bearing the word "kultur" and wearing a pickelhaube helmet with the word "militarism" is walking onto the shore of America while holding a half-naked woman in his grasp (possible meant to depict Liberty). This is a US version of an earlier British poster with the same image. Dated ca 1917.
Source: http://commons.wikimedia.org/wiki/Image:%27Destroy_this_mad_brute%27_WWI_propaganda_poster_(US_version).jpg