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BATTLE // August 20, 1940

Hundred Regiments Offensive

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Overview

The Hundred Regiments Offensive or the Hundred Regiments Campaign was a tactical campaign initiated by the Eighth Route Army, led by the Chinese Communist Party, against the Japanese invasion in North China from 20 August 1940, to 24 January 1941. The operation was named in recognition of the involvement of 105 regiments and represented the most extensive and protracted offensive by the Eighth Route Army in Japanese-occupied territory since the onset of the countrywide War of Resistance. The campaign aimed at undermining the Shijiazhuang–Taiyuan railway, a significant line under Japanese dominion, and spanned several crucial transportation corridors in North China, occurring in three distinct periods. The operation secured substantial strategic advantages, inflicted a severe setback on Japan's "prison cage policy," elevated national morale, and highlighted the crucial role of the Chinese Communist Party and its military as a cornerstone in the Second Sino-Japanese War.

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

Significance

The Hundred Regiments Offensive, launched on 20 August 1940 and extending to 24 January 1941, represented the largest and most sustained offensive operation mounted by the Eighth Route Army in Japanese-occupied North China since the start of the War of Resistance. Organized around 105 regiments and roughly 200,000 troops, the campaign targeted the Shijiazhuang–Taiyuan railway and several key transportation corridors under Japanese control, striking directly at the logistical and communications infrastructure sustaining the occupation. Operating across three distinct periods, the offensive inflicted over 12,000 casualties on Japanese forces and dealt a significant blow to Japan's 'prison cage policy,' a strategy designed to contain and strangle Communist-held base areas through interlocking blockhouses and road networks. Beyond its operational impact, the campaign elevated national morale and demonstrated that the Chinese Communist Party and the Eighth Route Army could conduct large-scale coordinated offensives, reinforcing their standing as a central military force in the broader Second Sino-Japanese War.

Forces & casualties

Troop strength

  • Republic of China200,000
    medium
  • Empire of Japan270,000
    medium

Empire of Japan fielded a 1.4 : 1 numerical advantage

Casualties

  • Republic of China22,000–100,000
    medium31% loss rate
  • Empire of Japan12,645
    medium5% loss rate

Commanders (9)

Empire of Japan

Republic of China

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Last verified May 2026
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