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31st Marine Expeditionary Unit

US military unit consisting of 2,200 Marines aboard three Navy amphibious ships ordered to the Middle East in March 2026.

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#584 Apr
#4319 Mar

Embarked force deploying to Gulf

Iran Conflict 2026: USS Boxer sails with second MEU
#3514 Mar

Revealed as part of 5,000-strong force, correcting earlier 2,200 figure

Iran Conflict 2026: Pacific force is 5,000, not 2,200
#3413 Mar

Redeployed 2,200 Marines from Pacific toward Middle East with F-35s

Iran Conflict 2026: 2,200 Marines pulled from Pacific