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#1
The Siliguri Corridor connects peninsular mainland India with the eight northeastern states: Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Tripura, and Sikkim.
#2
The corridor measures approximately 60 kilometers in length and narrows to roughly 20 to 22 kilometers at its most constricted choke point.
#3
Administratively, the corridor is located in the northern districts of West Bengal, centering on Siliguri sub-division in Darjeeling and Jalpaiguri districts.
#4
The corridor is flanked by three foreign nations: Nepal to the west, Bhutan to the northeast, and Bangladesh to the south.
#5
The Mechi River demarcates the international boundary between Nepal and the western flank of the Siliguri Corridor.
#6
The northern bottleneck of the corridor lies within 130 kilometers of the strategic Chumbi Valley, controlled by China in the Tibet Autonomous Region.
#7
The 2017 Doklam Plateau standoff occurred in territory disputed between Bhutan and China, situated close to the northern approach to the Siliguri Corridor.
#8
The Trishakti Corps (XXXIII Corps) of the Indian Army, headquartered at Sukna near Siliguri, is primarily tasked with defending the corridor and the eastern Himalayan approaches.
#9
Border security in the area is partitioned among specialized forces: BSF along the Bangladesh border, SSB along the Nepal and Bhutan borders, and the Indian Army and ITBP northward.
#10
National Highway 27, the longest east-west highway corridor connecting Porbandar in Gujarat to Silchar in Assam, runs directly through the Siliguri Corridor.
#11
National Highway 10 originates in the corridor near Siliguri and runs through Sevoke to connect Gangtok, serving as the lifeline of Sikkim.
#12
New Jalpaiguri (NJP) railway junction in the corridor is the largest and busiest rail hub connecting Northeast Frontier Railway (NFR) to the rest of the Indian railway network.
#13
The historic partition of Bengal in 1947 created the corridor by severing traditional transit routes across East Bengal (modern Bangladesh).
#14
Under the 1974 Land Boundary Agreement and subsequent protocols, the Tin Bigha Corridor in the Siliguri region was leased in perpetuity to Bangladesh in 2011 to link Dahagram-Angarpota enclaves.
#15
The Kaladan Multi-Modal Transit Transport Project connects Kolkata to Sittwe port in Myanmar and onwards to Zorinpui in Mizoram, providing an alternate sea-river-road route bypassing Siliguri.
#16
Under the Agreement on the Use of Chattogram and Mongla Ports, India gained transit rights through Bangladesh to move cargo into Tripura, Assam, and Meghalaya.
#17
The Akhaura-Agartala cross-border rail link (inaugurated in November 2023) directly connects Tripura with Bangladesh Railways, dramatically reducing travel time to Kolkata.
#18
Maitri Setu over the Feni River connects Sabroom in South Tripura to Ramgarh in Bangladesh, establishing direct access to the Bay of Bengal.
#19
Inland Waterway cargo travels between National Waterway 1 (Ganga-Bhagirathi-Hooghly) and National Waterway 2 (Brahmaputra) via the Indo-Bangladesh Protocol (IBP) route.
#20
The Sevoke-Rangpo railway line, an under-construction 45-km broad-gauge project with extensive tunnels, branches north from the corridor into Sikkim.
#21
Crude oil pipelines connecting the Numaligarh, Guwahati, and Bongaigaon refineries in Assam with Barauni in Bihar traverse the Siliguri Corridor.
#22
The Chicken's Neck term was popularized by strategic thinkers during the Cold War to denote high-vulnerability narrow territorial passages liable to military cut-off.
#23
The Teesta River flows through the eastern section of the corridor before crossing into Bangladesh, where its water sharing remains a prominent bilateral negotiation subject.
#24
The Mahananda River basin and Mahananda Wildlife Sanctuary lie directly within the northern perimeter of the Siliguri Corridor.
Subject Specialist Commentary
Analytical perspective & practical exam advice from the Master10 academic board
The Siliguri Corridor, colloquially called the "Chicken's Neck," is a narrow land bridge in northern West Bengal connecting mainland India to the eight northeastern states. Stretching sixty kilometers in length, it narrows to just twenty to twenty-two kilometers at its tightest point. This strip is flanked by three foreign nations: Nepal to the west, Bhutan to the northeast, and Bangladesh to the south. Major road arteries, railway lines, and pipelines pass through this passage to link the northeast with the rest of India.
Geopolitics questions in UPSC and State PSC exams frequently evaluate the Siliguri Corridor's strategic geography. Pay close attention to its proximity to the Chumbi Valley and the Doklam Plateau, highlighted during the 2017 military standoff. A common test trap confuses border forces: remember that BSF guards the Bangladesh border, while SSB patrols the Nepal and Bhutan borders. The Indian Army's Trishakti Corps, headquartered at Sukna, oversees territorial defense across this sensitive hub.
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