Land acquisition is at the centre of intense political and social disputes in the tribal hinterland of Chhattisgarh. On the one hand, Naxal extremists enforce their version of justice by opposing land alienation. But the new state has its compulsion industrialisation. That is where the Salwa Judum movement kicks in: it moves tribal people out of their land to expose rich subterranean resources. MAUREEN NANDINI MITRA discovers the nuances of the struggle on her travels