---
title: "Border Security Force (BSF): India's Border Guard"
description: "The Border Security Force (BSF) is India's largest border guarding force, protecting land borders with Pakistan and Bangladesh during peacetime."
url: "https://modeldiplomat.com/learn/glossary/border-security-force"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Border Security Force is a Central Armed Police Force of India that guards the country's land borders with Pakistan and Bangladesh during peacetime.
- Is the BSF part of the Indian Army?
- Which borders does the BSF guard, and which forces guard the rest?
- Why was the BSF's jurisdiction expansion to 50 km controversial?
- What is the legal basis of the BSF?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In October 2021, India's Ministry of Home Affairs extended the BSF's jurisdiction to 50 kilometres inside the border in Punjab, West Bengal and Assam, prompting Punjab to challenge the move in the Supreme Court over federal policing powers.

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