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The Battle of Dong Dang was the initial phase of the Battle of Lang Son during the Sino-Vietnamese War, taking place in the town of Đồng Đăng and vicinal positions between 17–23 February 1979. ==Battle== The Chinese People's Liberation Army (PLA) began their operations at 05:00 on 17 February〔 with a barrage of more than 6,000 artillery shells pounding on Vietnamese strongpoints and gun positions.〔Zhang, p. 96.〕 The Chinese had paved the way for their offensive throughout the night before by infiltrating the Vietnamese territory, cutting telephone lines and conducting sabotages.〔O'Dowd, p. 79.〕 Waves of PLA troops from the 55th Army quickly overwhelmed Hill 386, a position situated 1.5 km south of the border, killing 118 Vietnamese.〔 Though pockets of resistance were continued near the Friendship Pass and in Đồng Đăng, most of the Vietnamese defense was by then undertaken by the Vietnam People's Army (VPA) 12th Regiment southerly in the area around the hamlet of Thâm Mô.〔O'Dowd, p. 80.〕 The hamlet was situated on a low hill nearby the intersection of Highways 4A and 1B and Lạng Sơn–Nanning railroad, with Hills 423 and 505 to the east and Hill 339 to the west. The headquarters of the 12th Regiment was set up on Hill 438, located 1,000 m to the west of Hill 339.〔O'Dowd, p. 80-81.〕 Between Thâm Mô and Hill 339 was the French Fort, a large concrete fortification supported by 1.5-meter-thick wall lying on a hill to the southwest of Đồng Đăng. The fort, together with Thâm Mô and Hill 339, created a triangular mutually-supporting defensive structure, which was able to provide fire suppression against any attack on Đồng Đăng.〔Zhang, p. 97-98.〕 After taking Hill 386, the PLA used the 163rd Division to capture Đồng Đăng, as well as to strike Thâm Mô and Hills 339, 423, and 505.〔O'Dowd, p. 56.〕 The attack was backed by small groups of tanks arriving on Highway 4A.〔O'Dowd, p. 81.〕 These initial assaults were thwarted with heavy losses, including half of the tanks supporting the PLA 163rd Division destroyed.〔Zhang, p. 97.〕 The PLA responded by conducting two enveloping thrusts on the flanks of the Thâm Mô perimeter; one was carried out by Unit 33980 of the 54th Army to the east of Thâm Mô on the village of Thâm Lũng, and another was on Cồn Khoang, a position in the rear of Hill 339.〔O'Dowd, p. 81-82.〕 Chinese movement against Cồn Khoang was ambushed by the Vietnamese 63rd Company at about 09:00, with another Vietnamese platoon moving in behind the enemy to block their retreatment. Despite deploying an unevenly outnumbering force, Chinese advance toward Cồn Khoang was eventually crushed with one battalion nearly decimated.〔 At Thâm Lũng, Chinese launched massed attacks on several surrounding hills, which were stiffly contained by the defenders. On 18 February, a Vietnamese counter-attack launched by the VPA 2nd Regiment drove PLA units back to their assemble positions on Hills 409, 611, and 675; this pattern was repeated on the following days. On 23 February, the PLA stormed Phai Môn, a position to the east of Thâm Lũng, using six waves of attacks, of which all were rebuffed. Chinese forces had to launch twelve more charges throughout the day to finally break through Thâm Lũng, suffering over 1,000 killed.〔O'Dowd, p. 83.〕 In the Thâm Mô area, Chinese charges in mass formations had been continuously repulsed with heavy casualties. The Chinese field command had to switch their tactics, using small-unit attacks to flank Vietnamese positions instead of frontal attacks by human waves.〔O'Dowd, p. 82.〕 In the evening of 19 February, the PLA launched a new wave of attacks against the Thâm Mô line, sending one company to the French Fort, one battalion to Thâm Mô and another to Hill 339. The Vietnamese forces, again, successfully held on their positions and fought off the assaults, taking a high toll on the attackers. Half of the Chinese company from the 489th Regiment assigned to capture the French Fort were lost in the assault.〔Zhang, p. 98.〕 On 21 February, after receiving reinforcements, Chinese troops renewed their attack on the French Fort, securing most of the ground around it in a four-hour engagement. Failing to persuade the Vietnamese to surrender, the Chinese then used gasoline, explosives, and flamethrowers to demolish everything inside the fort, killing approximately 800 sheltering soldiers and civilians.〔 At 20:00 on 22 February, Thâm Mô finally fell to the hands of the PLA 163rd Division.〔 On 23 February, Chinese forces eventually captured the town of Đồng Đăng.〔Zhang, p. 99.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Battle of Dong Dang (1979)」の詳細全文を読む スポンサード リンク
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