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Concept
Defense of the Great Wall
Summary
The defense of the Great Wall () (January 1 – May 31, 1933) was a campaign between the armies of Republic of China and Empire of Japan, which took place before the Second Sino-Japanese War officially commenced in 1937 and after the Japanese invasion of Manchuria in 1931. It is known in Japanese as Operation Nekka and in many English sources as the First Battle of Hopei.
During this campaign, Japan successfully captured the Inner Mongolian province of Rehe from the Chinese warlord Zhang Xueliang, and incorporated it into the newly created state of Manchukuo, whose southern frontier was thus extended to the Great Wall of China.
Shanhaiguan is the fortified eastern end of the Great Wall of China, where the Great Wall meets the ocean. Per the terms of the 1901 Boxer Rebellion accord, the Imperial Japanese Army maintained a small garrison of around 200 men at Shanhaiguan. On the night of 1 January 1933, the Japanese garrison commander staged an "incident" by exploding a few hand grenades and firing a few shots. The Kwantung Army used this as an excuse to demand that the Chinese 626th Regiment of the Northeastern Army, guarding Shanhaiguan, evacuate the pass defenses.
When the Chinese garrison refused, the Japanese 8th Division issued an ultimatum, and then attacked the pass with the support of 4 armored trains and 10 tanks. The Japanese attack was supported by close air support from bombers, and by shelling by warships of the Imperial Japanese Navy's IJN 2nd Fleet with a dozen warships offshore. On January 3, Chinese regimental commander Shi Shian, unable to withstand this attack, was forced to evacuate from his positions after losing half of his force.
Battle of Rehe
The province of Rehe, on the northern side of the Great Wall, was the next target. Declaring the province to be historically a portion of Manchuria, the Japanese Army initially hoped to secure it through the defection of General Tang Yulin to the Manchukuo cause. When this failed, the military option was put into action.
Official source
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