Mountain warfare training for the Indian Army: from Siachen to Tawang

The Indian Army holds and operates in more high-altitude terrain than any other land force on earth. Siachen is the highest battlefield in the world. The Ladakh sector — from Galwan to DBO to Demchok — is the most contested high-altitude frontier in the world. Sikkim, Arunachal, Tawang, Kameng — the eastern arc of the LAC runs through 4,000-to-5,500-metre terrain that no peer military trains for at the operational tempo the Indian Army does. The institutional knowledge to fight in that terrain exists. The question is how fast it can be transferred to each new cohort.

HAWS and what it does well

The High Altitude Warfare School at Gulmarg — established in 1948, refined continuously — is the institutional anchor for Indian high-altitude doctrine. HAWS courses include the Mountain Warfare Course (MWC) and the Winter Warfare Course (WWC), each running multiple weeks, each combining classroom instruction with live high-altitude exercises in the Gulmarg-Pir-Panjal massif. Foreign militaries — US Army Special Forces, French chasseurs alpins, the UK's Royal Marines — send observers and trainees to HAWS, a testament to the institutional credibility that has compounded over seventy-five years.

HAWS does specific things well that no other training institution in the world does:

• Glacier movement instruction at operational tempo, including roped movement, crevasse rescue, and high-altitude casualty evacuation.
• Cold-weather injury prevention and management, with a curriculum that has been refined against actual cold-weather casualty data from Siachen rotations.
• Tactical movement in the specific snow-and-rock terrain conditions of the J&K and Ladakh sectors, with terrain-walks at altitude rather than briefings about altitude.

The gap that synthetic addresses

What HAWS cannot scale to is the rate at which infantry battalions now need pre-rotation rehearsal for the Ladakh and Arunachal theatres. A battalion rotating to a Ladakh sector deployment may have a single officer or NCO with prior HAWS experience and a cohort of soldiers whose first exposure to operational high-altitude terrain will be their actual deployment. The acclimatisation protocols address physiology. They do not address the tactical-rehearsal gap.

Two specific deficits compound:

• Section and platoon tactical drills in the specific terrain configurations of the destination sector. A platoon deploying to a Galwan-pattern terrain has not rehearsed in Galwan-pattern terrain. It has rehearsed in plains or in jungle.
• Cognitive-load rehearsal under representative physiological stress. High-altitude operations slow reaction times, degrade decision quality, and compound cumulative fatigue. The only way to build resistance is rehearsal under load — and that rehearsal cannot be created live without sending the unit to altitude, which the deployment itself is supposed to be doing.

Acclimatisation addresses physiology. It does not address the tactical-rehearsal gap.

What synthetic mountain rehearsal looks like

Synthetic mountain training is not a replacement for HAWS. It is a force-multiplier for the long flat space between HAWS courses, where most of the Army actually lives. Done correctly, it gives a deploying battalion two specific capabilities:

• Sector-specific terrain familiarity. A platoon can rehearse movement-contact drills, ambush response, and patrol patterns on a digital model of the precise terrain it will deploy into — including the specific ridge lines, observation posts, dead ground, and likely contact points.
• Crew-level coordination rehearsal under representative cognitive load. Synthetic environments can introduce decision pressure (timing, ambiguity, layered threats) at a fidelity that approximates the cognitive cost of operating at altitude, even without the physiological component.

SHAURYA-SIM was built with these requirements in mind. The terrain library includes mountain-specific environments, the scenario authoring tools allow a havildar to import sector-specific layouts, and the cognitive-load module — adjustable scenario tempo, layered ambiguity, restricted communication — is the closest synthetic approximation to the decision conditions of an actual high-altitude engagement that exists in Indian inventory.

The Tawang and Yangtse implication

The December 2022 Yangtse engagement in the Tawang sector — where Indian troops repulsed a PLA attempt to alter the LAC — surfaced specific learnings about high-altitude close-combat readiness. Among them: rapid response to a crossing attempt requires a level of unit-cohesion-under-load that is not built in standard pre-rotation training. The units that performed well had compounded reps in terrain that approximated the operational environment. Many had not.

The future LAC, particularly in the eastern arc from Arunachal through the Doklam-adjacent sectors, will be contested in conditions where peer adversary forces are themselves rapidly synthetic-training. The Chinese PLA has invested heavily in high-altitude synthetic training facilities since 2018. The Indian Army's institutional lead at HAWS does not survive automatically. Compounding the lead requires industrial-scale synthetic rehearsal at the section and platoon level, every rotation, every battalion.

What the next five years should look like

Three institutional moves would change the Indian Army's pre-rotation training quality at no significant marginal cost.

• Every infantry battalion in a Ladakh or Arunachal rotation cycle should have a synthetic-rehearsal block built into the pre-deployment training package, with sector-specific terrain modelled.
• HAWS should retain its institutional role as the doctrinal authority and validation centre, with synthetic environments graded against HAWS-published terrain and tactical standards.
• Section-level synthetic instruction should become a havildar-level skill — every platoon should be able to author and run mountain-rehearsal drills without external technical support.

The Indian Army's high-altitude advantage is institutional. Maintaining it through the next decade is a function of how rapidly that institutional knowledge can be replicated, rehearsed, and refreshed at the rate the operational tempo now demands. Synthetic mountain training is the only practical answer.