United Nations map of Siachen Glacier showing "Point NJ980420" (Point NJ9842) as the starting point of the "Actual Ground Position Line" (AGPL). The Nubra River valley and Siachen Glacier are held by India. The AGPL starts from NJ9842 and goes north to near Indira Col West. Goma military camp, Masherbrum Range, Baltoro Glacier, Baltoro Glacier, Baltoro Muztagh and K2 are held by Pakistan.Indo-Pak mutually-agreed undisputed "International Border" (IB) in the black line, Indo-Pak "Line of Control" (LoC) in black dotted line in the north and west, Indo-Sino "Line of Actual" (LAC) in black dotted line in the east, Indo-Pak line across Siachen in north is "Actual Ground Position Line" (AGPL). The areas shown in green are the two Pakistani-controlled areas: Gilgit–Baltistan in the north and Azad Kashmir in the south. The area shown in orange is the Indian-controlled territories of Jammu and Kashmir, and Ladakh, and the diagonally-hatched area to the east is the Chinese-controlled area known as Aksai Chin. "Territories ceded by Pakistan to China claimed by India" in the north is Shaksgam (Trans-Karakoram Tract).
In military terminology, Chumik is a minor sub sector of Bilafond Sub Sector,[3] near Gyong La.
In March 1989, Indian Army launched the Operation Ibex to seize the Pakistani post overlooking the Chumik Glacier. The operation was unsuccessful at dislodging Pakistani troops from their positions. The Indian Army under Brig. R. K. Nanavatty then launched an artillery attack on Kauser Base, the Pakistani logistical node on Chumik Glacier. The destruction of Kauser Base induced Pakistani troops to vacate their Chumik posts just west of Gyong La, and Operation Ibex concluded.[4] Chumik Glacier to this day is under the control of Pakistani forces, the Pakistani forces are stationed on a post called "Sher Post" which is perched on a ridge at the head of the Chumik Glacier at 19,000 feet.[5]
