The Northern Light Infantry (NLI) is a specialized unit of the Pakistan Army composed largely of recruits from Gilgit-Baltistan who are naturally acclimated to high-altitude environments. They have been the primary force holding the line in the Siachen and Kargil sectors for decades. Following their heroic but difficult role in various conflicts, the NLI was formally integrated from a paramilitary force into a regular regiment of the Pakistan Army.

In November 2003, during the tenure of Prime Minister Zafarullah Khan Jamali in Pakistan and Atal Bihari Vajpayee in India, a general ceasefire was agreed upon along the entire LoC and the AGPL in Siachen. While the military standoff continues and troops remain in their positions, the ceasefire has held remarkably well for over two decades, almost completely stopping the artillery duels that were common in the 1980s and 90s.

The environment at Siachen is far more lethal than the enemy. Statistics show that over 90% of the deaths on both sides have been due to avalanches, crevices, whiteouts, and altitude-related illnesses such as HAPE (High Altitude Pulmonary Edema) and frostbite. The cost of maintaining the conflict is also astronomical, with India and Pakistan spending millions of dollars daily just to provide food, heating, and oxygen to the troops.

The melting waters of the Siachen Glacier are the main source of the Nubra River in Ladakh. The Nubra then flows into the Shyok River, which eventually joins the Indus River. Because the glacier is a vital water source, the conflict has environmental and water-security implications for the downstream populations in both India and Pakistan, leading some environmentalists to propose turning the area into a 'Peace Park'.

Sia La is the northernmost pass on the Saltoro Ridge, situated at an approximate altitude of 18,300 feet (5,589 meters). It is one of the three main passes (along with Bilafond La and Gyong La) that India seized in 1984. Maintenance of a military presence at such altitudes is a human and logistical feat, as oxygen levels are extremely low and the risk of pulmonary edema is constant for the soldiers stationed there.

The Simla Agreement was signed by Zulfikar Ali Bhutto and Indira Gandhi following the 1971 war. It converted the old 'Ceasefire Line' into the 'Line of Control' (LoC). However, the negotiators focused on the inhabited areas and failed to clarify the demarcation beyond NJ9842, assuming the high-altitude glaciers were of no tactical value. This omission was exploited a decade later when both sides began competing for control of the 'empty' space.

Bilafond La is a critical pass on the Saltoro Ridge. In the local language, it translates to the 'Pass of the Butterflies.' Historically, it was a route used by travelers and Balti villagers. Since 1984, it has been one of the most heavily militarized spots on earth. Control of this pass allows the Indian Army to prevent any Pakistani advance onto the Siachen Glacier from the west, making it a key objective during the initial phases of Operation Meghdoot.

General Pervez Musharraf visited Pakistani troop positions in the Siachen region in 2005. Having served as a brigade commander in the same area earlier in his career, he had a personal connection to the conflict. His visit was intended to boost the morale of the troops stationed in the world's harshest terrain and to emphasize Pakistan's stance on the strategic importance of the glacier during a period of ongoing peace talks with India.

Colonel Narendra 'Bull' Kumar led an expedition to the Siachen Glacier in 1978 after noticing that foreign maps showed the glacier as part of Pakistan. He found Pakistani cigarette packs and evidence of international expeditions authorized by Pakistan. His reports on 'oropolitics' (using mountaineering to claim territory) alerted the Indian leadership, leading directly to the decision to launch Operation Meghdoot to secure the region before Pakistan could establish permanent military posts.

While the LoC ends at Point NJ9842, the 110-kilometer-long line that marks the current frontline of troops on the Siachen heights is officially called the Actual Ground Position Line (AGPL). It runs along the peaks of the Saltoro Ridge. India refuses to withdraw from these positions unless the AGPL is formally 'authenticated' and signed on a map by Pakistan, while Pakistan traditionally argues for a return to the pre-1984 positions as per the Simla Agreement.