Once the scale of the Pakistani incursion was realised, the Indian Army quickly mobilised about 200,000 troops, and Operation Vijay was launched. However, since the heights were under Pakistani control, India was at a clear strategic disadvantage. From their observation posts, the Pakistani forces had a clear line-of-sight to lay down indirect artillery fire on NH 1A, inflicting heavy casualties on the Indians. This was a serious problem for the Indian Army as the highway was its main supply route. Thus, the Indian Army's first priority was to recapture peaks that were in the immediate vicinity of NH 1A. This resulted in Indian troops first targeting the Tiger Hill and Tololing complex in Dras. This was soon followed by more attacks on the Batalik–Turtok sub-sector, which provided access to Siachen Glacier. Point 4590, which had the nearest view of the NH 1A, was successfully recaptured by Indian forces on 14 June.