Siachen is not a battle on a grand scale. As the author explains, at the cutting edge of the war is a section of 8 or 10 men holding on to an iced-up bunker at 21,000 feet against the numbers the enemy can organise at the end of his stretched logistic chain. Simply being on the mountain at that altitude demands strong reserves of self-discipline and character. To fight and give one’s life, unseen and unknown, on the roof of the world requires a level of motivation that is heroic. Is Siachen worth the loss of such gallant lives? Obviously not, the author concludes, but the failure to disengage from Siachen has not been for want of trying. In the first few years, the drive to militarise the glacier came from the as-yet unproved strategic implications of a giant Sino-Pakistani pincer to take Ladakh, matching Pakistani fears from an imagined Indo-Soviet pincer to isolate the Northern Areas.