Bengal: Shah reviews Siliguri Corridor security, pushes for ‘triangular grid’
The Union Home Ministry held a security review meeting at Sukna, on the outskirts of Siliguri, with senior West Bengal officials and central forces to assess arrangements along the eastern borders
The review focused primarily on strengthening security at the Siliguri Corridor, popularly called the "Chicken's Neck," which links the Northeast to the rest of India
A "Triangular Security Grid" was proposed, involving three new garrisons to be positioned at Dhubri (Assam), Kishanganj (Bihar), and Chopra (West Bengal)
Discussions covered enhanced border surveillance and closer coordination among the Border Security Force (BSF), the Sashastra Seema Bal (SSB), state police, and intelligence agencies
The Siliguri Corridor ("Chicken's Neck")
The Siliguri Corridor is a narrow strip of land in northern West Bengal that forms the sole land connection between mainland India and its eight northeastern states. Geographically it is squeezed between Nepal to the west, Bangladesh to the south, and Bhutan to the north, with the India-Bhutan-China tri-junction (Chumbi Valley/Doklam plateau) lying close to its northern edge.
Key Details
- Narrowest width: approximately 20-22 km; the corridor stretches roughly 170 km in length
- Serves as the principal road, rail, and air link for over 40 million people in the Northeast
- Its vulnerability was highlighted during the 1962 Sino-Indian War and again during the 2017 Doklam standoff, when Chinese road-building near the tri-junction raised concerns about the corridor's exposure
- Also referred to in strategic literature as a "chokepoint" because any disruption here could functionally isolate the Northeast from the mainland
The security review and the proposed Triangular Security Grid are a direct response to this structural vulnerability — the corridor's narrowness means even a localised threat can have outsized strategic consequences for national connectivity.
Border Guarding Forces — BSF and SSB Mandates
India's international borders are guarded by distinct central armed police forces under the "one border, one force" principle, each with a specific sector under the Ministry of Home Affairs. This division of labour is relevant to understanding how coordination in a multi-agency review like this one works.
Key Details
- The Border Security Force (BSF) was raised in 1965 (after the 1965 Indo-Pak war) and primarily guards the India-Pakistan and India-Bangladesh borders
- The Sashastra Seema Bal (SSB), originally raised in 1963 as the Special Service Bureau, was reorganised and renamed in 2001; it is the designated lead force for the India-Nepal and India-Bhutan borders, both of which are open, largely unfenced borders
- Both forces operate under the Ministry of Home Affairs, distinct from the Army's operational combat role along the Line of Actual Control and Line of Control
- The Siliguri Corridor sits at the seam of BSF and SSB jurisdictions given its proximity to Bangladesh, Nepal, and Bhutan simultaneously
The review specifically brought together BSF, SSB, state police, and intelligence agencies because the corridor's security depends on seamless coordination across these overlapping jurisdictions rather than any single force acting alone.
The Doklam Standoff (2017) and the India-Bhutan-China Tri-Junction
The Doklam plateau, near the India-Bhutan-China tri-junction close to the Chumbi Valley, was the site of a 73-day military standoff in 2017 after China attempted to extend a road in territory claimed by Bhutan. India intervened citing implications for its own security, given the plateau's proximity to the Siliguri Corridor.
Key Details
- The standoff lasted from June to August 2017 and was resolved through diplomatic disengagement
- The tri-junction's strategic significance lies in its proximity (roughly 130 km) to the Siliguri Corridor — any expanded Chinese presence there is viewed as a potential threat to the corridor
- India and Bhutan have a longstanding treaty relationship (Treaty of Friendship, most recently revised in 2007) that includes coordination on border and security matters
The Home Ministry's emphasis on strengthening the corridor reflects continuing concern about developments near this tri-junction and the broader northern flank of the corridor.
- Siliguri Corridor: narrowest point ~20-22 km wide, ~170 km long, connects mainland India to 8 northeastern states
- Bordered by Nepal (west), Bangladesh (south), Bhutan (north); near India-Bhutan-China tri-junction
- Proposed Triangular Security Grid garrisons: Dhubri (Assam), Kishanganj (Bihar), Chopra (West Bengal)
- BSF raised: 1965; SSB raised: 1963 (as Special Service Bureau), renamed 2001
- Doklam standoff: June-August 2017, ~73 days
- Review meeting held at Sukna, near Siliguri, August 22, 2026