India counters China's 'map war', assigns official names to 27 Arunachal sites
India formally identified and assigned official names to 27 places and geographical features in Arunachal Pradesh on the Survey of India's official map.
The list includes border-sensitive locations such as Long Ju (site of a 1959 border incident) and Thag La (associated with the 1962 conflict), along with mountain passes (Dzo La, Riza La, Pukur La), villages (Bisa, Maja, Jairampur, Sagar, Padma), the high-altitude Sambho Sarovar lake, and war memorials such as Jaswant Garh.
The move was described as an effort to remove ambiguity in official records and provide accurate public recognition of these locations, several of which lie close to the Line of Actual Control (LAC).
The exercise follows China's repeated practice of issuing "standardised" Mandarin, Tibetan and Pinyin names for places in Arunachal Pradesh, which India has consistently rejected as "vain and preposterous."
India has reiterated that such naming exercises by China do not alter the fact that Arunachal Pradesh "was, is, and will" remain an integral part of India.
The McMahon Line and the Legal Basis of the Eastern Sector Boundary
The McMahon Line, agreed at the 1914 Simla Convention between British India and Tibet, delineates roughly 890 km of the boundary along the eastern Himalayan crest and forms the basis of the India-China boundary in the Arunachal Pradesh sector. China was present at the Simla Convention but did not sign the final agreement, primarily objecting to the terms on Tibetan autonomy, and has never accepted the McMahon Line as a legitimate international boundary.
Key Details
- Simla Convention signed in 1914 by British India (Henry McMahon) and Tibetan representatives; China attended but withheld its signature.
- India treats the McMahon Line as the legal international boundary in the eastern sector; China claims most of Arunachal Pradesh as "South Tibet"/"Zangnan," arguing Tibet lacked the sovereign authority to conclude the boundary agreement.
- The dispute over this sector was a proximate cause of the 1962 Sino-Indian War, with Thag La and Long Ju among the early friction points (1959 and 1962 respectively).
Several of the 27 newly named sites, including Thag La and Long Ju, sit directly on this contested eastern sector boundary, underscoring that India's naming exercise is a direct assertion of sovereignty along the legally recognised McMahon Line.
China's "Standardised Names" Exercise for Arunachal Pradesh
Since 2017, China's Ministry of Civil Affairs has periodically issued lists of "standardised" place names (in Mandarin, Tibetan script and Pinyin transliteration) for locations in Arunachal Pradesh, which it refers to as "Zangnan." India has rejected each round as having no bearing on ground reality or sovereignty.
Key Details
- China issued its first list of 6 names in 2017, followed by 15 names in 2021, 15 more in 2021-end/2023, 11 in 2023, 30 in April 2024, and 27 more in May 2025 — a cumulative tally of roughly 89 names by mid-2025, continuing into 2026 with further releases (e.g., 23 more names in April 2026).
- China frames the exercise as an exercise of its own "sovereignty" over what it calls Zangnan, rejecting India's objections.
- India's Ministry of External Affairs has consistently responded that "renaming does not alter the fact" that Arunachal Pradesh is, has been, and will remain an integral and inalienable part of India.
India's assignment of official names to 27 sites is widely read as a direct, proportionate counter to China's sixth-plus round of unilateral renaming, reasserting administrative and cartographic sovereignty over the same geography China claims.
Line of Actual Control (LAC) — Sectors and Border Management Framework
The LAC is the de facto boundary between Indian and Chinese-held territory, distinct from an internationally delimited border, and is divided into three sectors. Unlike the Line of Control (LoC) with Pakistan, which arose from a 1972 bilateral agreement (Shimla Agreement), the LAC has never been mutually delineated on the ground, making place identification and mapping strategically significant.
Key Details
- The LAC runs through three sectors: western (Ladakh, roughly 1,597 km), middle (Uttarakhand and Himachal Pradesh, roughly 545 km), and eastern (Sikkim and Arunachal Pradesh, roughly 1,129 km); India assesses total LAC length at about 3,488 km, while China's assessment differs substantially.
- Boundary talks are institutionally handled through the Special Representatives (SR) mechanism, established in 2003, distinct from routine military and diplomatic channels.
- Border Personnel Meeting (BPM) points and Confidence Building Measures (CBMs) under various bilateral agreements (1993, 1996, 2005, 2013) govern day-to-day management of the LAC.
Many of the 27 newly named sites are located close to the LAC in the eastern sector, reinforcing India's administrative presence and aiding accurate identification for border management and security operations.
Arunachal Pradesh — From NEFA to Statehood
Arunachal Pradesh's administrative and constitutional evolution reflects its strategic sensitivity: from a frontier tract under central control to full statehood, it has always been treated as a critical borderland requiring direct central oversight before political integration.
Key Details
- The North-East Frontier Agency (NEFA) was constituted in 1954, administered directly by the Ministry of External Affairs given its border sensitivity.
- NEFA was renamed Arunachal Pradesh and made a Union Territory in 1972; it attained full statehood on 20 February 1987 under the State of Arunachal Pradesh Act, 1986, becoming India's 24th state.
- The state's Legislative Assembly strength was raised from 30 to 60 seats at the time of statehood.
The 27-site naming exercise is consistent with India's long-standing approach of treating Arunachal Pradesh's administrative integration as central to asserting its sovereignty in the border region.
- 27 sites/features named by India on the official Survey of India map (announced 7 August 2026).
- China has issued "standardised" name lists for Arunachal Pradesh roughly six times since 2017 (2017: 6 names; 2021: 15; 2023: 11; April 2024: 30; May 2025: 27; April 2026: 23), totalling around 89+ names as of 2025-26.
- McMahon Line: agreed 1914 (Simla Convention); spans about 890 km along the eastern Himalayan crest.
- LAC total length: approximately 3,488 km per India's assessment (western sector ~1,597 km, middle sector ~545 km, eastern sector ~1,129 km).
- Arunachal Pradesh: UT status from 1972 (as renamed from NEFA, created 1954); full statehood from 20 February 1987, as India's 24th state.
- Named sites include Long Ju (1959 flashpoint), Thag La (1962 conflict site), and war memorials such as Jaswant Garh.