When I think of places in revolt around the world, I have gotten the impression India's problems are limited to the Kashmiri northwest and the areas where Sikh independence is popular. Much less publicity has focused on the Maoist uprising that has been going on for 40 years.
The Maoist Naxalites are a guerrilla insurgency in rural and jungle India. They are particularly strong among the tribal people at the very bottom of India's status hierarchy. This Associated Press article estimates their numbers at 10,000 to 15,000. The Indian government has had little success in suppressing the revolt. Meanwhile, the Naxalites show no signs of either winning or fading away.