I read somewhere of an operation where our boys were stranded in some remote corner of Gilgit for some 6 months holding out despite low ammo or no ammo where repeated attempts to supply them by the IA were thwarted by the Gilgit Scouts and the PA during the 1948 war due to the inhospitable terrain . The precise details escape me but the officer / soldier in question was of Gorkha origin and was probably the sole survivor taken PoW by the PA after his surrender and stay in Pakistan having a gallantry medal conferred on him ( VC / MVC?) By the GoI.Through mountains .... a couple of weeks to entirely secure the area. Through plains ... 6-7th day into Afghanistan.
The point behind raking this up is while the IA is certainly not what it used to be in 1948 but the same could get said of the PA. Plus we have to factor in a heavily armed hostile civilian population with the possibility of guerrilla warfare. In the light of all this, will you still maintain that we'd be on the gates of Wakhan within 2-3 weeks whether it means crossing hills or plains or both and fording rivers too.