Rana sangha took back his territory. And the other conflicts you mention were against fellow "Indians". I put it in quotes, because as you mention there was no India back then. But there was a shared culture and off course religion. I never said Indians were never violent. My original comment was that India (as a whole) has never been the aggressor against it's neighbors. And you still haven't disproved that. I don't know what you are checkmating.
But we agree there was no India to ascribe this non-invasive nature to, before unification. With the result that India-as-a-whole is the product of aggression against neighbors, where all those neighbors became India, but only quite recently, meaning that there hasn't been much time for India as a whole to be aggressive against further neighbors.
It's like saying that the English never invaded anywhere before 927. Of course they didn't, because the first English king was crowned in 927, and before that the English were the West Saxons, South Saxons, East Angles, Middle Angles, South Angles, Men of Kent, two flavors of Northumbrians and a few stray Welsh, and they were all busy invading one another.