Pentagon review: 153 civilians killed in US Yemen strikes

For defense planners, ISR analysts, and precision-strike program managers, the Pentagon's finding that three April 2025 airstrikes in Yemen 'more likely than not' caused civilian harm is a hard lesson in target development and weapon effects modeling. The Ras Isa port strike alone killed 80 civilians and wounded 171, underscoring the challenge of hitting dual-use fuel infrastructure without mass harm in a contested littoral zone. As the Space & Defense community refines counter-maritime and counter-UAS doctrine, this review will feed into debates on munitions selection, collateral damage methodology, and the operational trade-offs of denial campaigns.

The Pentagon has formally acknowledged in an unclassified civilian-casualty review that U.S. airstrikes against Iranian-backed Houthi militants in Yemen killed 153 civilians and wounded 243 others during operations in April 2025. The assessment, obtained by The Associated Press and first reported by NBC News, was transmitted to Congress as part of an annual report on civilian casualties and is slated for formal submission in the coming months, according to a Pentagon official who spoke on condition of anonymity. The review concentrates on three specific strikes: two near the Houthi-held capital of Sanaa and one against the Ras Isa fuel terminal on the Red Sea coast. The Ras Isa strike was the deadliest, killing 80 civilians and injuring 171, setting tanker trucks ablaze and producing the type of mass-casualty scene that Houthi media quickly broadcast via its al-Masirah network.

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The review concentrates on three specific strikes: two near the Houthi-held capital of Sanaa and one against the Ras Isa fuel terminal on the Red Sea coast.

These strikes did not occur in isolation. Throughout 2024 and 2025, the Houthis launched attacks on commercial shipping in the Red Sea, a corridor that carries a significant share of global maritime trade to the Suez Canal and Mediterranean. The United States justified the April 2025 strikes as efforts to remove a fuel source used to sustain Houthi attacks and to cut off revenue that has funded what U.S. Central Command called more than a decade of regional destabilization. In its April 2025 statement, CENTCOM asserted the port strike 'was not intended to harm the people of Yemen.' But the review's conclusion that all three strikes 'more likely than not' resulted in civilian harm is a critical, and damning, acknowledgment. In U.S. Defense Department practice, 'more likely than not' is the standard used for civilian harm assessment, meaning the preponderance of evidence supports the finding.

The disclosure carries substantial policy and legal implications. Civilian harm on this scale—153 deaths and 243 injuries across just three strikes—raises questions about distinction, proportionality, and precautions in attack under international humanitarian law. Targeting a dual-use fuel terminal in an active port area involves foreseeable dense civilian presence; the fact that CENTCOM reached a 'more likely than not' finding after the operation suggests either pre-strike collateral damage estimates underestimated civilian presence or post-strike assessment processes detected harm that was not transparently reported initially. The report's transmission to Congress as part of the annual civilian casualties review will almost certainly intensify scrutiny from oversight committees and human rights organizations, and may complicate future U.S. arms sales, coalition operations, and rules of engagement in the region.