The Dusadh (also known as Paswan) are a Hindu community generally found in the states of Northern India (Uttar Pradesh, Rajasthan, Bihar, Uttarakhand and Delhi) and few parts of Eastern India (Jharkhand, West Bengal) and Nepal.
Historically a pastoral community, many Dusadhs fought on behalf of the East India Company during the 18th century.
The 2011 Census of India for Uttar Pradesh showed the Dusadh population, which was classified as a Scheduled Caste, as being 230,593.
References
Dusadh Wikipedia(Text) CC BY-SA