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Iran Targets Diego Garcia (4,000 km), Deploys IRBM (3,000-5,500 km) for First Time; US-UK Base Critical to Indo-Pacific Strategy

Target:UPSC GS-IIMPSCSSC GATeachingPrelims HighMains HighStatic GK Link
21 Mar 2026
~2 min
Source: Indian Express
Key Data:4000 km attack range3000-5500 km IRBM range17 sq mi atoll size99-year lease term£101 million annual fee
Bodies:International Court of Justice (ICJ)US Space Force
Practice MCQs from today's news ▸
What This Article Covers

1.Iran launched two IRBMs (3,000-5,500 km range) at the joint US-UK military base on Diego Garcia, located 4,000 km away, marking its longest-range attack and confirming IRBM capabilities.

2.Diego Garcia is a 17 sq mi atoll in the Chagos Archipelago, strategically positioned 3,000 km from both the Bab-el-Mandeb and Malacca Straits, and is one of only two US bomber bases in the Indo-Pacific.

3.The attack follows the 2025 transfer of Chagos sovereignty to Mauritius and a 99-year leaseback of Diego Garcia to the UK, raising complex issues of sovereignty, forced displacement of Chagossians, and escalation risks in regional conflicts.

The Big Picture
Prelims · HighMains · High

Iran's attempted ballistic missile strike on the distant US-UK base at Diego Garcia (4,000 km away) reveals its possession of intermediate-range ballistic missiles (IRBMs) for the first time, shattering its claimed 2,000 km range cap. This strategic escalation in the Indian Ocean highlights the critical importance of Diego Garcia, a 'permanently anchored aircraft carrier' central to US power projection across the Indo-Pacific and two vital maritime chokepoints.

Exam Lens

Quick Exam Facts From News

Attack Distance4,000 km (Iran to Diego Garcia)
IRBM Range3,000 - 5,500 km
Diego Garcia Size17 sq miles
Displaced Population1,500-2,000 Chagossians (1968-73)
New Lease Term99 years to UK (from May 2025)
Annual Lease Fee£101 million

1-Minute Revision

  • ›Attack Distance: 4,000 km (Iran to Diego Garcia)
  • ›IRBM Range: 3,000 - 5,500 km
  • ›Target this Data: IRBM range (3,000-5,500 km) and attack distance (4,000 km).
  • ›Target this Nodal Body: The International Court of Justice (ICJ) and its 2019 advisory opinion on Chagos.
  • ›Target this Legal Point: The 99-year leaseback of Diego Garcia to the UK after sovereignty transfer to Mauritius (2025).

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

The 2019 advisory opinion that the UK's separation of the Chagos Archipelago from Mauritius was illegal was issued by which international body?

Q2Statement-basedHard

Consider the following statements regarding the news:

1. Iran's attempted strike on Diego Garcia, at a range of 4,000 km, was carried out using its newly disclosed Intermediate-Range Ballistic Missiles (IRBMs).

2. Diego Garcia is strategically significant because it is located less than 1,000 km from the Strait of Hormuz, allowing quick deployment to the Persian Gulf.

3. In May 2025, the UK transferred sovereignty of the Chagos Islands to Mauritius and simultaneously leased back Diego Garcia for a period of 50 years.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, what is the range bracket for Intermediate-Range Ballistic Missiles (IRBMs) that Iran deployed?

Q4Application/ImpactMedium

What was a primary strategic implication of Iran's attempted missile strike on Diego Garcia, as highlighted in the analysis?

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