Analysis of information sources in references of the Wikipedia article "Chamar" in English language version.
According to them, before the emergence of Naxalism on the scene and consequent resistance on the part of these hapless fellows, "rape of lower caste women by Rajput and Bhumihar landlords used to cause so much anguish among the lower cates, who, owing to their hapless situation, could not dare oppose them. In their own words, "within the social constraints , the suppressed sexual hunger of the predominant castes often found unrestricted outlet among the poor, lower caste of Bhojpur-notably Chamars and Mushars.
In 1970, when Babu Jagjivan Ram (himself, a chamar) became the defence minister, he attempted to raise the chamar regiment.
...I am a chamar from Punjab...