The 1952 annual march on International Workers’ Day turned bloody when plainclothes policemen fired into the demonstrators, setting off a riot that resulted in three hundred arrests. Those targeted were members of unions and political parties who had resisted affiliating themselves with the government. In this poster, a near life-size man stands in front of the main text, which reads like an extension of the banners waving in the background. His outstretched hand urges the viewer to join the cause. Rather than illustrating the arrests that the poster condemns, Francisco Mora created an image that taught the viewer how to react to such events, and implied that others were already doing the same.