ever heard the name of Pragjotishpur or Kamrup which was mentioned in the Hindu Epic Mahabharata.similarly Tripura is named after Goddess Tripureswari Devi and it was a hindu kingdom from time immemorial!Manipur as a kingdom is also mentioned in the Epic Mahabharata!so as these all were historically hindu kingdoms India and only India has got the legitimate claim on these states!
No, all of asia from Bali to Pathanistan in the west of Pakistan are all a part of Maha Bharat, but only in your wet dreams.