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BATTLE // May 11, 1943

Battle of Attu

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Overview

The Battle of Attu, which took place on 11–30 May 1943, was fought between forces of the United States, aided by Canadian reconnaissance and fighter-bomber support, and Japan on Attu Island off the coast of the Territory of Alaska as part of the Aleutian Islands campaign during the American Theater and the Pacific Theater. Attu is the only land battle in which Japanese and American forces fought in snowy conditions, in contrast with the tropical climate in the rest of the Pacific. The battle ended when most of the Japanese defenders were killed in brutal hand-to-hand combat after a final banzai charge broke through American lines.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Attu was the concluding engagement of the American effort to retake the western Aleutian Islands, pitting roughly 15,000 U.S. troops against a Japanese garrison of approximately 2,600. The Japanese force was effectively destroyed: 2,351 Japanese died against 1,148 U.S. casualties. The battle eliminated Japanese ground presence on Attu and advanced the broader Aleutian Islands campaign, which aimed to remove the only Axis foothold on North American soil. Retaking Attu also positioned Allied forces to move against the remaining Japanese-held island of Kiska, completing the campaign to secure the Aleutian chain and the approaches to Alaska. The engagement is notable as the only land battle of the Pacific war fought in snowy, subarctic conditions rather than the tropical terrain that characterized most U.S.-Japanese ground combat.

Tactics

The battle ended with a final Japanese banzai charge that broke through American lines, after which most of the remaining Japanese defenders were killed in brutal hand-to-hand combat. Canadian forces contributed and fighter-bomber support alongside the main U.S. ground effort. Beyond this, the source does not detail the specific maneuvers, dispositions, or terrain use employed during the fighting.

Forces & casualties

Troop strength

  • United States15,000
    medium
  • Japan2,600
    medium

United States fielded a 5.8 : 1 numerical advantage

Casualties

  • United States1,148
    medium8% loss rate
  • Japan2,351
    medium90% loss rate

Commanders (6)

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6 sibling battles · 6 factions

Last verified June 2026
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