What campaign launched by the Eighth Route Army in North China from August to December 1940 dealt a heavy blow to the Japanese army?

A. Hundred Regiment Battle.

At 8 pm on August 20, 1940, the Japanese invaders came under violent attack on all important transportation lines in North China at the same time. The roar of guns and artillery was everywhere on the front lines stretching thousands of miles behind the enemy lines. This huge offensive was launched by the main force of the Eighth Route Army.

From August 20 to September 10, it was the first stage of the Hundred Regiment War. The Eighth Route Army uprooted numerous enemy strongholds on major railways and highways in North China, proposing "leave no railway track behind". With the battle slogan "Leave not a sleeper, not a bridge", they dug up the road bed section by section and burned the sleepers, completely paralyzing the enemy's transportation network in North China.

In the second and third stages of the campaign, the Eighth Route Army continued to sweep away enemy strongholds on both sides of the communication lines and deep inside the revolutionary base areas, and smashed the enemy's large-scale retaliatory "mopping up".

On December 5, the Hundred Regiment War ended with our army's brilliant victory. In this campaign, our army conducted more than 1,800 battles, uprooted about 3,000 enemy strongholds, killed and injured 25,800 Japanese and puppet troops, captured more than 18,000 enemies, and seized a large amount of military supplies.

Extended information:

Historical background of the Hundred Regiments War:

In the early days of the Anti-Japanese War, the Eighth Route Army and the New Fourth Army carried out guerrilla warfare behind enemy lines, regained large areas of lost territory, and established It started from a series of anti-Japanese base areas behind enemy lines such as Shanxi-Chahar-Hebei, Shanxi-Sui, Shanxi-Hebei-Shandong-Henan, Central China, and South China. The active resistance of the Eighth Route Army and the New Fourth Army aroused great panic among the Japanese invaders. They pressed 540,000 of the 860,000 invading troops into the battlefields of the liberated areas.

The Japanese invaders built many bunkers around the liberated areas, blocked and divided them, and implemented a "cage policy" against the liberated areas. The criss-crossing railway and highway transportation lines were the pillars and chains of the "cage" of the Japanese invaders. The enemy used these transportation lines to split the anti-Japanese base areas into small pieces, and relied on these transportation lines to "encroach" and "mopping up" the base areas. ".

In order to smash the enemy's "cage", the main force of the Eighth Route Army concentrated more than 100 regiments with about 300,000 troops. After full preparation, the "Hundred Regiment Battle", which is famous at home and abroad, was launched. Therefore, the focus of the Hundred Regiment War is the general attack on the enemy's communication lines, and destroying the enemy's effective forces while destroying the enemy's communication lines.

People's Daily Online - August 20, 1940 Hundred Regiments War