I once had posted a very elaborate description of the historical events. I had time to kill that day, not possible to do that every time, so I'll just say this, the militia had almost reached the Srinagar airport before Indian army landed there. I believe 27th October, 1947 was the date when 1st Sikh Battalion landed in Srinagar airport. The Pakistani militia has actually lost ground after that.
Pakistan has also lost some ground in '65, I believe, Kargil being the most salient among them and of course Siachen, if you claim it to be Pakistani territory.