UK and Mauritius Agreement on Chagos Islands Sovereignty
Source:The Hindu ↗
Why It Matters
The Chagos Islands, particularly Diego Garcia, are critical for maritime security and power projection in the Indian Ocean and the broader Indo-Pacific. The resolution of this sovereignty dispute illustrates the evolving dynamics of decolonization, the influence of international judicial bodies like the ICJ, and the balancing of global strategic military interests with international law.
Summary
The United Kingdom has reached a historic agreement to hand over sovereignty of the disputed Chagos Islands to Mauritius, resolving a long-standing decolonization conflict. A central pillar of the deal ensures that the strategically vital joint US-UK military base on Diego Garcia will continue to operate under a 99-year lease. The handover follows significant international legal and diplomatic pressure, notably a 2019 advisory opinion from the International Court of Justice and subsequent UN General Assembly resolutions demanding the UK relinquish control. The agreement also paves the way for addressing the historical displacement of the Chagossian people while maintaining the geopolitical stability of the Indian Ocean region.
Key Points
- The UK has signed an agreement to hand over sovereignty of the Chagos Archipelago to Mauritius, ending a decades-old territorial dispute.
- Under the deal, the joint US-UK military base on Diego Garcia will remain operational under a 99-year lease, securing Western strategic interests in the Indian Ocean.
- The agreement addresses the historical injustice of the forced displacement of the Chagossian people in the 1960s and 70s to make way for the military base.
- The resolution follows mounting international pressure, including a 2019 ICJ advisory opinion and UNGA resolutions that deemed the UK's administration of the islands unlawful and incomplete decolonization.
Important Terms
Chagos Archipelago
A strategic Indian Ocean island group detached from Mauritius by the UK in 1965 to form the British Indian Ocean Territory (BIOT).
UPSC context
GS Paper 2 (International Relations); tests knowledge of territorial disputes and India’s maritime neighborhood security.
Diego Garcia
The largest Chagos island, hosting a vital joint US-UK military base; central to the 99-year lease agreement between the UK and Mauritius.
UPSC context
GS Paper 2 (Geopolitics); examines Indian Ocean power dynamics and Indo-Pacific security architecture.
2019 ICJ Advisory Opinion on Chagos
A landmark 2019 ruling stating the UK's decolonization of Mauritius was incomplete and that the Chagos Islands should be returned.
UPSC context
GS Paper 2 (International Institutions); tests understanding of ICJ’s advisory jurisdiction and decolonization law.
UK-Mauritius Sovereignty Agreement
The 2024 accord transferring sovereignty of the Chagos Islands to Mauritius while securing the status of the Diego Garcia military base.
UPSC context
GS Paper 2 (International Relations); analyzes bilateral diplomacy and the resolution of long-standing colonial legacies.
International Court of Justice (ICJ)
The principal judicial organ of the UN that settles legal disputes between states and provides non-binding advisory opinions.
UPSC context
GS Paper 2 (International Institutions); a core topic for global governance and legal dispute resolution.
United Nations General Assembly (UNGA)
The main deliberative organ of the UN which passed a 2019 resolution demanding the UK relinquish control of the Chagos Islands.
UPSC context
GS Paper 2 (International Institutions); evaluates the role of multilateral bodies in international pressure and decolonization.
Decolonization
The historical process of colonies gaining independence; the Chagos dispute is often called the 'last vestige of decolonization' in Africa.
UPSC context
GS Paper 1 (World History) and Paper 2 (IR); central to post-colonial world order studies.
Prelims Trap
"The 2019 ICJ ruling was a binding order that legally compelled the UK to surrender the Chagos Islands."
ICJ advisory opinions are inherently non-binding. The UK's handover is the result of a negotiated bilateral treaty driven by political pressure, not a legally binding court decree.
Static Concepts Connected
What are the two types of jurisdiction exercised by the International Court of Justice (ICJ)?
- Contentious Jurisdiction: Binding legal judgments on disputes submitted by consenting UN member states.
- Advisory Jurisdiction: Non-binding legal opinions on questions submitted by authorized UN organs (like the UNGA) and specialized agencies.
How are the major coral atoll chains geographically arranged in the central Indian Ocean?
- North-to-South Alignment: They form a continuous north-to-south alignment: Lakshadweep (India) in the north, Maldives in the middle, and Chagos in the south.
- Geological Formation: All three chains are coral atolls built atop the Chagos-Laccadive Ridge, a prominent submarine volcanic ridge.
Cross-Topic Patterns
India's dual-track IOR diplomacy
India publicly championed Mauritius's decolonization claims at the UN, while quietly balancing its own military logistics pacts (LEMOA) with the US, which operates the Diego Garcia base.
Indian Ocean strategic base race
The 99-year Diego Garcia lease connects to broader Indian Ocean militarization, parallel to China's base in Djibouti and India's strategic infrastructure development in Agalega (Mauritius).
Expect a 2026 map question arranging Indian Ocean island chains North-to-South (Lakshadweep, Maldives, Chagos) alongside ICJ powers.
Linked PYQs · 3
Linked PYQs · 3
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