effects of the pinpoint non-stop bombing by the Mirage-2000, by day and by night, became evident with almost immediate effect. In many vital points, neither artillery nor air power could dislodge the outposts manned by the Pakistani soldiers, who were out of visible range. The Indian Army mounted some direct frontal ground assaults which were slow and took a heavy toll given the steep ascent that had to be made on peaks as high as . Since any daylight attack would be suicidal, all the advances had to be made under the cover of darkness, escalating the risk of freezing. Accounting for the wind chill factor, the temperatures were often as low as near the mountain tops. Based on military tactics, much of the costly frontal assaults by the Indians could have been avoided if the Indian Military had chosen to blockade the supply route of the opposing force, creating a siege. Such a move would have involved the Indian troops crossing the LOC as well as initiating aerial attacks on Pakistani soil, however, a manoeuvre India was not willing to exercise due to the likely expansion of the theatre of war and reduced international support for its cause. Two months into the conflict, Indian troops had slowly retaken most of the ridges that were encroached upon by the infiltrators; according to the official count, an estimated 75–80% of the intruded area and nearly all the high ground were back under Indian control. Washington Accord and final battles Following the outbreak of armed fighting, Pakistan sought American help in de-escalating the conflict. Bruce Riedel, who was then an aide to President Bill Clinton, reported that US intelligence had imaged Pakistani movements of nuclear weapons to forward deployments for fear of the Kargil hostilities escalating into a wider conflict. However, President Clinton refused to intervene until Pakistan had removed all forces from the Indian side of the LOC. Following the Washington accord of 4 July 1999, when Sharif agreed to withdraw Pakistani troops, most of the fighting came to a gradual halt, but some Pakistani forces remained in positions on the Indian side of the LoC. In addition, the United Jihad Council (an umbrella for extremist groups) rejected Pakistan's plan for a climb-down, instead deciding to fight on. The Indian army launched its final attacks in the last week of July in co-ordination with relentless attacks by the IAF, both by