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BATTLE // August 25, 1945

Soviet invasion of South Sakhalin

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Overview

The Soviet invasion of South Sakhalin, also known as the Battle of Sakhalin, was the Soviet invasion of the Japanese portion of Sakhalin Island also known as Karafuto Prefecture. The invasion was part of the Soviet–Japanese War, a minor campaign in the Asian Theatre during the Second World War.

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

Significance

The Soviet invasion of South Sakhalin was one component of the broader Soviet–Japanese War, a campaign conducted in the Asian Theatre during the Second World War. Soviet forces numbering approximately 100,000 faced a Japanese garrison of around 19,000. Soviet casualties totaled 1,191 against Japanese losses of approximately 2,000. The operation resulted in Soviet seizure of the Japanese-administered portion of Sakhalin Island, known as Karafuto Prefecture, extending Soviet territorial control over the island.

Forces & casualties

Troop strength

  • Soviet Union100,000
    medium
  • Japan19,000
    medium

Soviet Union fielded a 5.3 : 1 numerical advantage

Casualties

  • Soviet Union1,191
    medium1% loss rate
  • Japan2,000
    medium11% loss rate

Commanders (7)

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2 sibling battles · 2 factions

Last verified June 2026
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