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U.S. Marine Dies at Guantanamo Bay Naval Base: What We Know So Far

Saturday, August 9, 2025 by Richard Morales

U.S. Marine Dies at Guantanamo Bay Naval Base: What We Know So Far
Guantánamo Naval Base (Reference Image) - Image of © Wikipedia

Last Sunday, a U.S. Marine tragically passed away at the Guantanamo Bay Naval Base under circumstances that are currently being investigated by the Naval Criminal Investigative Service (NCIS). Corporal Santiago Llanes, of Hispanic descent, served as the assistant administrative chief in the Security Force Company of the Marine Corps at Guantanamo. He joined the Corps in 2022.

Details regarding his original nationality and the specific circumstances surrounding his death have not been disclosed. According to Stars and Stripes, a military-focused publication by the U.S. Department of Defense, Lieutenant Colonel Rob Dolan stated that Llanes was discovered unconscious in his barracks and was pronounced dead at the scene.

The Marine's death was attributed to "non-combat related injuries," as cited by the source. NCIS spokesperson Meredith March confirmed, "The NCIS is actively investigating the facts surrounding Marine Corporal Santiago Llanes' death, as we do in response to any non-combatant and unattended service member fatalities within the Department of the Navy."

Honoring the Fallen: Transfer and Ceremony

On Wednesday, Llanes' remains were transported to Dover Air Force Base in Delaware, where a Marine Corps team conducted a dignified transfer ceremony, a solemn military tribute to honor the fallen.

An official photo released showed several soldiers carrying a casket containing Corporal Santiago Llanes' remains on August 6.

Established in 1903, the Guantanamo Bay Naval Base remains a key U.S. military installation. In addition to its strategic role in naval and security operations, it has gained international recognition as the location of a high-security detention center since 2002. Over the decades, it has frequently been a source of diplomatic tension with the Cuban regime, yet continues to be crucial for U.S. military deployment in the Caribbean.

Recently, the base garnered attention as it temporarily housed undocumented migrants, many with criminal backgrounds.

FAQs about the Incident at Guantanamo Bay

What were the circumstances of Corporal Santiago Llanes' death?

Corporal Santiago Llanes was found unconscious in his barracks at Guantanamo Bay and was declared dead at the scene. His death is under investigation by the NCIS, and it has been attributed to non-combat related injuries.

What is the significance of the Guantanamo Bay Naval Base?

The Guantanamo Bay Naval Base is a strategic U.S. military installation established in 1903. It is known for its naval operations and high-security detention center, and has been a point of diplomatic tension with Cuba.

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