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Topic 279 · Geography & Places in News

Iran's missile fire at Diego Garcia

10 MCQs · tap an option to check it · All answers

Revise the 12 points first Book 1 RATNA
  1. Core Trigger: On 20 March 2026 Iran fired at least two Khorramshahr-4 ballistic missiles at the US-UK base on Diego Garcia.
  2. Outcome: One missile failed in flight; a US warship's SM-3 interceptor destroyed the other.
  3. Key Place: Diego Garcia lies in the Chagos Archipelago in the Indian Ocean, which Mauritius claims.
  4. Treaty Status: Britain and Mauritius signed a treaty on 22 May 2025 giving Mauritius sovereignty; it remains unratified.
  5. Stakeholders: Iran, the United States, the United Kingdom and Mauritius are the key parties.
  6. India Link: Diego Garcia sits in the Indian Ocean region, so security events there touch India's maritime neighbourhood.
  7. Venue: Diego Garcia is the largest island of the Chagos Archipelago, in the central Indian Ocean.
  8. Founded: Britain created the British Indian Ocean Territory in 1965 by detaching Chagos from Mauritius.
  9. Landmark: The ICJ advisory opinion of 2019 held the UK's continued administration of Chagos unlawful.
  10. Legal Basis: The ICJ held that decolonisation of Mauritius was not lawfully completed in 1968; it also invoked self-determination.
  11. Articles: Article 96 of the UN Charter lets the General Assembly request ICJ advisory opinions.
  12. Doctrine: An advisory opinion is not binding, but it states authoritative international law; self-determination is a core principle.
Question 1 of 10

Which Iranian missile type was fired at Diego Garcia on 20 March 2026?

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Answer: (B) Khorramshahr-4

Core Trigger: On 20 March 2026 Iran fired at least two Khorramshahr-4 ballistic missiles at the US-UK base on Diego Garcia.From Book 1 RATNA, topic 279, point 1

Question 2 of 10

One missile failed in flight; what destroyed the other?

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Answer: (A) A US warship's SM-3 interceptor

Outcome: One missile failed in flight; a US warship's SM-3 interceptor destroyed the other.From Book 1 RATNA, topic 279, point 2

Question 3 of 10

Diego Garcia lies in which island group?

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Answer: (C) Chagos Archipelago

Key Place: Diego Garcia lies in the Chagos Archipelago in the Indian Ocean, which Mauritius claims.From Book 1 RATNA, topic 279, point 3

Question 4 of 10

Which is/are correct? 1. Britain and Mauritius signed a treaty on 22 May 2025 giving Mauritius sovereignty. 2. That treaty has been ratified.

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Answer: (A) Only 1

Treaty Status: Britain and Mauritius signed a treaty on 22 May 2025 giving Mauritius sovereignty; it remains unratified.From Book 1 RATNA, topic 279, point 4

Question 5 of 10

Besides Iran, the UK and Mauritius, which state is a key party at Diego Garcia?

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Answer: (D) United States

Stakeholders: Iran, the United States, the United Kingdom and Mauritius are the key parties.From Book 1 RATNA, topic 279, point 5

Question 6 of 10

Diego Garcia's location touches India's maritime neighbourhood in which ocean region?

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Answer: (B) Indian Ocean

India Link: Diego Garcia sits in the Indian Ocean region, so security events there touch India's maritime neighbourhood.From Book 1 RATNA, topic 279, point 6

Question 7 of 10

In which year did Britain create the British Indian Ocean Territory?

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Answer: (A) 1965

Founded: Britain created the British Indian Ocean Territory in 1965 by detaching Chagos from Mauritius.From Book 1 RATNA, topic 279, point 8

Question 8 of 10

The ICJ advisory opinion holding the UK's continued Chagos administration unlawful came in which year?

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Answer: (C) 2019

Landmark: The ICJ advisory opinion of 2019 held the UK's continued administration of Chagos unlawful.From Book 1 RATNA, topic 279, point 9

Question 9 of 10

The ICJ held decolonisation of Mauritius was not lawfully completed in which year?

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Answer: (A) 1968

Legal Basis: The ICJ held that decolonisation of Mauritius was not lawfully completed in 1968; it also invoked self-determination.From Book 1 RATNA, topic 279, point 10

Question 10 of 10

Which is/are correct? 1. An ICJ advisory opinion is legally binding. 2. Article 96 of the UN Charter lets the General Assembly request ICJ advisory opinions.

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Answer: (B) Only 2

Articles: Article 96 of the UN Charter lets the General Assembly request ICJ advisory opinions.From Book 1 RATNA, topic 279, point 11

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