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If the lead starts with "... a kingdom mentioned in Mahabharata", then it is only about what the Mahabharata says. It doesn't have to exist in the real world. Whether such a page has any value or not, I don't know. We might need to raise at WT:INDIA.
For other locations/kingdoms/regions that are real, we need to base them on WP:HISTRS only, except that there might be a section "In the Mahabharata", which describes what the Mahabharata says.
