BY SPRING 1940, huge tracts of countryside in northern China were in Communist hands. In one series of battles in March, immediately after Stalin’s tacit go-ahead, the Communists concentrated 30,000–40,000 troops, and destroyed over 6,000 Nationalists. Having established a strong position in northern China, 8RA commanders Zhu De and Peng De-huai felt it incumbent on them to do something against the Japanese, and on 1 April they ordered preparations for large-scale sabotage operations against Japanese transportation lines. Mao refused to permit the attack. Instead, he ordered all available troops to be moved to east central China to seize more territory there. Zhu and Peng were forced to abandon their plan.
At this point, Chiang invited Zhu, who minded about the continuing internal strife, to Chongqing to discuss a solution. En route, Zhu stopped in Yenan, as Mao had told him that a Party congress was about to convene. Zhu found no congress — and no sign of one. Nonetheless, he was prevented from proceeding to Chongqing, and was in effect detained in Yenan for the rest of the war. Even though he was the C-in-C of the 8RA, he played no role in the war, and Mao basically used him as a rubber stamp.
Mao sent someone else to Chongqing — Chou En-lai, who was now the exclusive channel with Chiang. Mao had completed his stranglehold on communications with the two places that counted — Moscow and Chongqing.
At this time, in May 1940, the Sino-Japanese war entered a critical phase. The Japanese began to intensify their bombing of Chongqing, which soon became the most heavily bombed city in the world to date; over the next six months, the tonnage dropped on it equaled one-third of what the Allies dropped on all Japan throughout the Pacific War; up to 10,000 civilians died in one raid. The Japanese army meanwhile advanced up the Yangtze towards Chongqing. Tokyo demanded that France close the railway from Vietnam, and that Britain shut down the Burma Road — the only routes into now landlocked China other than from Russia. Both Western states acquiesced, on 20 June and 18 July, respectively (although Britain’s closure was only for three months). In Chongqing, sentiment strengthened for a deal with Japan. Chiang — and China — were facing a momentous crisis.
To Mao the crisis was a godsend — the worse the better. He said later that he “had hoped they [the Japanese] would go as far as … Chongqing.” That way, he reckoned, Russia would have to intervene.
But Peng De-huai, now de facto chief of the 8RA after Zhu’s quasi-detention in Yenan, wanted to take some of the heat off Chongqing, and resuscitated his plans for a large operation to sabotage Japanese transportation lines in northern China, calling it by the resounding name of “Operation 100 Regiments.” On 22 July he ordered the 8RA to get ready to launch on 10 August, and radioed the plan to Mao, twice. There was no reply. When Peng got no answer to a third cable, he gave the go-ahead for the 20th.
Peng knew that Mao would dislike his operation. Not only would it help Chiang, it would also hurt the Reds, as Tokyo was bound to retaliate against Red territories. Peng was putting country before Party.
The operation, which lasted about a month, mainly involved attacks on installations, not on Japanese troops. It took the Japanese “totally by surprise,” in their own words. Damage to railways and highways in some sections was reported as “extremely serious” and “on an indescribably large scale” (the sabotage work was carried out partly by corvée labor). The Jingxing coal mines, which supplied the key Anshan iron and steel works in Manchuria, were badly hit, and the main mine put out of action “for at least half a year.” The Japanese had to pull back one division from the front against Chiang, and briefly delay plans to capture two railways into southern China.
The main effect was on Chinese morale, especially in heavily bombed Nationalist areas. The Nationalist press there praised the 8RA for taking the offensive, and for “dealing a deadly blow to enemy rumours that we are split and sunk in internal strife.” From Chongqing, Chou cabled Mao that the operation had had “an extremely big impact.” “We are publicising it and propagating it everywhere … now is the time to spread our Party’s influence …” Mao milked the fall-out to the hilt.
But in private he was seething, partly because the operation led to heavy Red casualties—90,000, according to Zhu De. The Japanese took extremely harsh reprisals against Red-controlled territory, which was soon reduced by about half; the population under Red rule fell from about 44 to some 25 million. But Peng soon got the 8RA and the bases back on their feet. In slightly over two years, the 8RA more than recovered its pre-1940 strength, to 400,000 men, and Peng had rebuilt its base areas.