106 districts spanning 10 states across India, described as being a part of the Left wing extremism activities, constitutes the Red corridor.

In West Bengal the districts of Pashim Medinipur, Bankura, Purulia and Birbhum are part of the Red corridor.

[1] In the period 2009-2011 LWE violence resulted in more than 500 deaths and a similar number missing in Paschim Medinipur district.

[2] The Lalgarh movement, which started attracting attention after the failed assassination attempt on Buddhadeb Bhattacharjee, then chief minister of West Bengal, in the Salboni area of Paschim Medinipur district, on 2 November 2008 and the police action that followed, had also spread over to these areas.

Although the epi-centre of the movement was Lalgarh, it was spread across 19 police stations in three adjoining districts – Paschim Medinipur, Bankura and Purulia, all thickly forested and near the border with Jharkhand.

[5] The Chota Nagpur Plateau gradually slopes down creating an undulating area with infertile laterite rocks/ soil.

[11] See also – List of West Bengal districts ranked by literacy rate Primary Census Abstract Data

[14] Others include Addi Bassi, Marang Boro, Santal, Saranath, Sari Dharma, Sarna, Alchchi, Bidin, Sant, Saevdharm, Seran, Saran, Sarin, Kheria,[15] and other religious communities.

[19] Persons engaged in agriculturein Sankrail CD block Although the Bargadari Act of 1950 recognised the rights of bargadars to a higher share of crops from the land that they tilled, it was not implemented fully.

In 2013–14, persons engaged in agriculture in Sankrail CD block could be classified as follows: bargadars 4.87%, patta (document) holders 41.19%, small farmers (possessing land between 1 and 2 hectares) 2.15%, marginal farmers (possessing land up to 1 hectare) 16.65% and agricultural labourers 35.14%.

[19] The United Nations Development Programme considers the combined primary and secondary enrolment ratio as the simple indicator of educational achievement of the children in the school going age.

[23] Sankrail Anil Biswas Smriti Mahavidyalaya was established at Kultikri in 2007 and is affiliated to Vidyasagar University.

It offers arts courses with honours in English, Bengali, Sanskrit, Santali, history and political science.

[24] In 2014, Sankrail CD block had 1 rural hospital and 2 primary health centres with total 51 beds and 3 doctors.

[19] Bhangagarh Rural Hospital, with 30 beds at Bhanga Gar, PO Keshiapata, is the major government medical facility in the Sankrail CD block.