BARSUR, India — At the edge of the Indravati River, hundreds of miles from the nearest international border, India effectively ends. Indian paramilitary officers point machine guns across the water. The dense jungles and mountains on the other side belong to Maoist rebels dedicated to overthrowing the government. “That is their liberated zone,” said P. Bhojak, one of the officers stationed at the river’s edge in this town in the eastern state of Chattisgarh. Or one piece of it. India’s Maoist rebels are now present in 20 states and have evolved into a potent and lethal insurgency. In the last four years, the Maoists have killed more than 900 Indian security officers, a figure almost as high as the more than 1,100 members of the coalition forces killed in Afghanistan during the same period. Continua…