International RelationsSecurity
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IRIS Dena Frigate Sunk by US Submarine, 130 Sailors Lost Post MILAN-2026 Exercise with India

Target:UPSC GS-IIMPSCSSC GATeachingPrelims HighMains HighStatic GK Link
05 Mar 2026
~2 min
Source: Indian Express
Key Data:130 sailors40 nautical miles off GalleMILAN-2026
Bodies:Indian NavyIranian NavyUnited States NavyPentagon
Practice MCQs from today's news ▸
What This Article Covers

1.US submarine torpedoed Iranian frigate IRIS Dena in international waters off Sri Lanka, sinking it with 130 sailors.

2.The incident occurred after the frigate participated in India's MILAN-2026 naval exercise, being termed a 'guest of India’s Navy'.

3.The event is a rare post-WWII attack on an enemy warship at sea, setting a dangerous precedent in an escalating US-Iran-Israel conflict.

The Big Picture
Prelims · HighMains · High

An Iranian warship, returning from the Indian Navy's MILAN-2026 exercise, was sunk by a US submarine in international waters, escalating tensions. This incident directly implicates India's diplomatic balancing act and tests the principle of freedom of navigation.

Exam Lens

Quick Exam Facts From News

Sunk WarshipIRIS Dena (Moudge-class frigate)
Number of Sailors130
Location of Incident~40 nautical miles off Galle, Sri Lanka
Recent Indian EventMILAN-2026 & IFR, Visakhapatnam (Feb 2026)

1-Minute Revision

  • ›Sunk Warship: IRIS Dena (Moudge-class frigate)
  • ›Number of Sailors: 130
  • ›Target this Data: 130 sailors on board IRIS Dena.
  • ›Target this Nodal Body: Indian Navy (host of MILAN-2026 exercise).
  • ›Target this Legal Point: Freedom of navigation in international waters under UNCLOS.

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

Q1Static LinkageEasy

The MILAN-2026 naval exercise, mentioned in the news, is hosted by which country's navy?

Q2Statement-basedHard

Consider the following statements regarding the news incident:

1. The sunken Iranian warship, IRIS Dena, was a Moudge-class frigate.

2. The attack occurred within the territorial waters of Sri Lanka.

3. The US Navy destroyer USS Pinckney actively participated in the MILAN-2026 exercises alongside the Iranian frigate.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, approximately how many sailors were on board the Iranian frigate IRIS Dena when it was sunk?

Q4Application/ImpactMedium

What is a primary diplomatic challenge for India arising from the incident described in the news?

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