India – Bangladesh

The international border between Bangladesh and India, also referred to as the International Border (IB), separates the eight divisions of Bangladesh and the Indian states. The fifth-longest land border in the world, Bangladesh and India are separated by an international border that is 4,096 kilometers (2,545 miles) long. Along the border are the Bangladeshi divisions of Mymensingh, Khulna, Rajshahi, Rangpur, Sylhet, and Chittagong. The border separating the two states is delineated by several pillars. Fencing is present on both sides of small, clearly marked sections of the boundary.

Following the partition of India, the Radcliffe Line was made public on August 17, 1947, designating the border between India and Pakistan. Early on, Bangladesh was also referred to as East Pakistan. It was given that name in honor of the building's architect, Sir Cyril Radcliffe, who was tasked with separating 88 million people among 450,000 square kilometers (175,000 square miles) of area as the chairman of the Border Commissions.

Since 1974, India and Bangladesh have engaged in eight rounds of bilateral negotiations, each with a different understanding of their maritime boundaries and exclusive economic zones. These negotiations have been fruitless until 2009, when both parties decided to submit their disputes to arbitration under the UNCLOS. The dispute was finally resolved on July 7, 2014, when the Arbitration Tribunal ruled in Bangladesh's favor. This decision was graciously accepted by all parties. South Talpatti (also known as "New Moore"), a small, uninhabited offshore sandbar that became an island in the wake of the Bhola storm in 1970 and vanished around March 2010, was also in dispute.

Length: 4,096 kilometers