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BATTLE // July 31, 1905

Japanese invasion of Sakhalin

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Overview

The Japanese invasion of Sakhalin was the last land battle of the Russo-Japanese War, and took place from 7 July to 31 July 1905.

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

Significance

The Japanese invasion of Sakhalin was the final land engagement of the Russo-Japanese War, concluded on July 31, 1905. Japan committed roughly 14,000 troops against a Russian force of approximately 7,280 defenders, inflicting around 3,270 Russian casualties. As the last land battle of the war, the seizure of Sakhalin strengthened Japan's negotiating position ahead of the Portsmouth Peace negotiations, which would formally end the conflict. Control of the island represented a tangible territorial gain secured in the war's closing weeks.

Forces & casualties

Troop strength

  • Japan14,000
    medium
  • Russia7,280
    medium

Japan fielded a 1.9 : 1 numerical advantage

Casualties

  • Russia3,270
    medium45% loss rate

Commanders (3)

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6 sibling battles · 3 factions

Last verified June 2026
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