The ongoing military standoffs with China at multiple points along the India-China border has turned the spotlight to the single most important element that has helped keep the peace across the Himalayas: the Line of Actual Control (LAC). Yet, what exactly the LAC is remains a source of much confusion.
One possible reason for the confusion is that in the public imagination, it is sometimes spoken of in the same breath with that other contested three-letter abbreviation that is often in the news: the Line of Control (LoC) that separates India and Pakistan. They are different in one crucial way. With Pakistan, India has an international boundary, which has been agreed upon, and the LoC, which has been delineated on a map by both sides. In contrast, the alignment of the LAC has never been agreed upon, and it is has neither been delineated nor demarcated. There is no official map in the public domain that depicts the LAC. It can best be thought of as an idea, reflecting the territories that are, at present, under the control of each side, pending a resolution of the boundary dispute. In a strange irony, if the LAC is far less clear than the LoC, it has remained much more peaceful, with not a shot fired since 1975 at Tulung La.
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Where does the LAC run? For the most part, in the western sector, it broadly corresponds with the border as China sees it. There are differences in several points here, including at the very start of the LAC, which India reportedly pegs northwest of the Karakoram Pass, but China further south. In the eastern sector, it broadly corresponds with the border as India sees it, along the McMahon Line that separates Arunachal Pradesh from Tibet. In the middle sector and Sikkim, the LAC is broadly aligned with the borders as India and China see it, with minor differences here.
Following the Tulung La incident, Delhi’s China Study Group set patrolling limits that India would stick to, in order to assert its LAC alignment — limits that are still being followed today. The problem is India and China do not agree on the alignment of the LAC everywhere. Difference