However, if we look more closely into the description of this town, we find that this is not so.
We can guess that someone (probably a bored British soldier) invented this backronym as a joke which somehow became popular. After all "Military Headquarters Of War" is a non-standard phrase which really has no meaning-why not just Army Headquarters? And which war?
Here it is mentioned that the name is derived from "British Army Base In Native Asia". Elsewhere I have seen it with "Northern Asia". As in the case of Mhow, someone seems to have "created" this explanation which got accepted by others. It is easy enough to see that this is a joke; have you come across the phrase "Native Asia" in any standard reference book or historical document? And Northern Asia is generally understood to mean Siberia, Mongolia and perhaps part of China which were never ruled by the British. And when there were hundreds of British Army bases all over the country, what was special about this place to deserve this name? It was and is of some importance, but is certainly not one of the largest cantonments in the country.
which mentions that the name stands for Transit Halt Of Indian Soldiers Enroute (to Siachen). This sounds a little more plausible than the examples quoted earlier.
However, a veteran IAF pilot who had served in this area in the 1960s pointed out that IAF transport aircraft were using this airstrip back then, long before anyone had heard of the Siachen Glacier. It was not until 1984 that our army took up positions there. It was known as Thoise even then, presumably named after a village in the vicinity.
Which PC? The computer, the cop or Piggy Chops?
5) (Britain): Police Constable (Enid Blyton fans would have fond memories of PC Goon).
6) (Indian media some years ago): When P. Chidambaram was considered to be a financial whiz kid, the Indian financial press referred to him as PC.
7) (Indian Railways until recently): Pantry Car, though in recent years many of them have been renamed as Hot Buffet Cars.
8) (India): Priyanka Chopra, earlier known fondly as Piggy Chops before the US discovered her.