Crossing of the Yangtze River

Strategic Context

By the spring of 1949, the three great campaigns of the Civil War — Liaoshen, Huaihai, and Pingjin — had destroyed the core of Nationalist military power. Over 1.5 million Nationalist troops had been killed, captured, or defected. The Yangtze River, up to two kilometres wide in places, was the last credible natural barrier available to the Nationalist government and the last line behind which a rump state might survive. Chiang Kai-shek, recognising the mainland was lost, formally "retired" on 21 January 1949, handing executive authority to Acting President Li Zongren — a manoeuvre designed to preserve his personal control over the military and party apparatus while distancing himself from impending defeat.

The Communists, having destroyed Nationalist offensive capacity, now faced the question of whether to halt at the Yangtze and allow a divided China — with a Communist north and a Nationalist south — or to press the campaign to total victory. Mao and the Central Military Commission chose the latter. The strategic objective was not merely to cross the river, but to annihilate organised Nationalist resistance before it could reconstitute itself in the south.

Peace Talks and Their Failure

Between January and April 1949, Li Zongren authorised a peace delegation to travel to Beijing and negotiate with the CPC under Zhou Enlai. The talks appeared to offer a final opportunity to avoid further bloodshed. Li hoped that the CPC might accept a negotiated partition along the Yangtze, or at least terms that preserved some autonomy for a Nationalist-administered south.

On 15 April the CPC presented its final eight-point peace terms, which amounted to unconditional surrender: the Nationalist government would be "reorganised" — effectively dissolved — and folded into the new Communist-led political structure. Li Zongren rejected the terms on 20 April, and the deadline passed. The following morning, Zhu De and Mao Zedong issued the Order to Advance on the Entire Front. The failure of the Beijing talks meant that the CPC's crossing of the Yangtze was launched the day after peace negotiations formally collapsed — a sequence that features prominently in the contrasting narratives of Taiwan and mainland historiography about who bears responsibility for the continuation of the war.

Three Field Armies: Deployment and Command

The crossing operation was the largest river assault in Chinese military history, coordinated across three field army commands along a front of nearly 500 kilometres.

The Third Field Army, commanded by Chen Yi with Su Yu as deputy commander and principal operational planner, formed the central thrust. Striking across the sector facing Nanjing, it bore the greatest Nationalist resistance and was first assigned the objective of the capital. Su Yu's meticulous preparation — rehearsing river crossings, coordinating artillery, timing the assault to exploit gaps in Nationalist patrol schedules — was central to the operation's success in the first 24 hours.

The Second Field Army, commanded by Liu Bocheng with Deng Xiaoping as political commissar, crossed in the western sector around Jiujiang in Jiangxi Province, threatening to outflank Nationalist forces from the interior. The Fourth Field Army under Lin Biao, already committed to operations in Central China, provided pressure and logistical support from the north, preventing the Nationalists from redeploying forces southward to reinforce the river line.

The Crossing

On 20 April — the day Li Zongren rejected the CPC peace terms — a significant incident prefigured what was to come. The British Royal Navy frigate HMS Amethyst was sailing up the Yangtze to relieve the garrison at Nanjing when she was shelled by PLA artillery, killing 46 sailors and wounding 83 more. The ship was trapped on the river and held for three months before making a dramatic night escape on 30 July. The Amethyst incident was not an isolated provocation: it reflected the PLA's determination to assert total control over the river and to signal that the era of foreign warships operating freely on Chinese inland waters had ended.

In the early hours of 21 April, under cover of darkness and artillery suppression, PLA forces crossed the Yangtze simultaneously along virtually the entire front. The assault force used whatever vessels were available: wooden junks, fishing boats, commandeered river steamers, and improvised rafts. Despite Nationalist artillery and air attack, the crossing proceeded with extraordinary speed. Within 24 hours, the defensive line had collapsed across nearly its full length. The combination of the vast assault frontage, the political demoralisation of Nationalist units, and the operational superiority Su Yu had built into the planning made a coordinated defence impossible.

Fall of Nanjing

Nanjing, the Nationalist capital, fell on 23 April 1949 — just two days after the crossing began. PLA soldiers entered the Presidential Palace and raised the red flag over its gate tower: the image became one of the defining photographs of the Communist revolution, reproduced across Chinese media for decades. The speed of the capital's fall shocked international observers who had anticipated a prolonged fight for the city.

The Nationalist government withdrew south — first to Guangzhou, then to Chongqing, and ultimately, by December 1949, to Taipei. Li Zongren, increasingly marginalised by Chiang Kai-shek who had re-emerged to direct the retreat, eventually flew to the United States in 1949 and did not return to China until 1965. The Nationalist state's collapse over the following months was rapid: Guangzhou fell in October, Chongqing in November, Chengdu in December.

The Shanghai Campaign

The liberation of Shanghai (12 May – 27 May 1949) was the most operationally complex phase of the campaign. Shanghai was China's largest city, its principal port, and the centre of its commercial and industrial economy. The CPC intended to inherit it intact: a city destroyed in street fighting would be of little use. Chen Yi issued explicit orders that heavy artillery was not to be used within the urban core and that foreign settlements and installations were to be left untouched to avoid triggering international intervention.

The Nationalist garrison of approximately 120,000 troops, commanded by Tang Enbo, defended the city's outer perimeter rather than contesting the street-by-street fighting that would have caused the greatest destruction. PLA forces encircled Shanghai from the north and south, squeezing the perimeter over two weeks. By 27 May the city had fallen; the last Nationalist troops evacuated by sea to the island of Zhoushan. Shanghai's factories, banks, and infrastructure remained largely intact — a deliberate outcome that reflected the new government's awareness of what it was taking over.

The formal end of the Yangtze campaign is generally dated to 2 June 1949, when PLA forces completed the liberation of the Zhoushan archipelago and Chongming Island, clearing the last Nationalist positions at the mouth of the Yangtze.

Historical Significance

The crossing of the Yangtze and the fall of Nanjing effectively ended organised Nationalist resistance on the Chinese mainland. The Civil War continued in the southwest and northwest for several more months, but after April 1949 the outcome was no longer in question. The People's Republic of China was formally proclaimed on 1 October 1949 — five months after PLA forces crossed the river.

The Amethyst incident and the broader assertion of Chinese sovereignty over the Yangtze carried a significance that extended far beyond the military campaign. For Britain and the Western powers, it marked the definitive end of the treaty-port era and of the system by which foreign warships had patrolled Chinese inland waters since the Opium Wars. The United States, which had reduced military aid to the Nationalists during the 1948–49 campaigns, chose not to intervene directly — a decision shaped by the State Department's assessment, later published as the China White Paper (August 1949), that the Nationalist defeat was the product of internal failures rather than American shortcomings.

The unresolved question of Taiwan — where the Nationalist government reconstituted itself under Chiang Kai-shek — would define the Taiwan Strait as one of the Cold War's most durable flashpoints. The crossing of the Yangtze thus set the geographic and political parameters of a confrontation that has yet to reach a final resolution.