The US, USSR and China — Sino-Soviet and Sino-US relations (1947–1979) (History HL)

The big idea: For years the Cold War looked like a simple two-way fight, USA against USSR. But in 1949 a third giant joined the board. China was communist, huge, and had its own interests — it was never going to just follow Moscow's orders forever.

On 1 October 1949, Mao Zedong stood in Beijing and proclaimed the People's Republic of China (PRC), after the Chinese Communist Party (CCP) defeated the Nationalist government in a long civil war.

The defeated Nationalists, led by Chiang Kai-shek, fled to the island of Taiwan. The USA refused to recognise the new communist government, and kept treating Chiang's regime in Taiwan as the 'real' China.

Shut out by Washington, Mao had little choice but to look to Moscow. In December 1949 he travelled to the USSR to meet Stalin.

The Sino-Soviet Treaty of Friendship, Alliance and Mutual Assistance (Feb 1950): After tense weeks of negotiation, Stalin and Mao signed a 30-year treaty. Its terms bound the two communist giants together: a promise of mutual defence if either was attacked, Soviet loans and technical aid (engineers, factory blueprints, military advisers), and shared hostility to the USA and Japan.

On the surface this looked like solid communist unity. But Mao privately resented how hard Stalin had bargained, and how little he had actually given — the loan was small, and Stalin kept special rights in Chinese ports and railways left over from the old Tsarist empire.

The alliance in action: Korea: The treaty was tested almost at once. When the Korean War broke out in June 1950, China sent hundreds of thousands of troops to fight alongside North Korea after US-led forces pushed north towards the Chinese border. The USSR supplied weapons and air support but avoided sending its own soldiers directly. China paid in blood; Moscow paid in hardware — an early sign the 'alliance' was not shared equally.

Spot it fast: 1949 = PRC founded. 1950 = Treaty signed. 1950–53 = Korean War, where Chinese troops did the heaviest fighting. Underneath the friendly photographs, resentment was already building.

The alliance that looked so solid in 1950 was in open, bitter rivalry within fifteen years. Two separate arguments pulled Moscow and Beijing apart: what communism should mean, and who controlled which land.

Argument one: what kind of communist should you be?

Stalin died in 1953. His successor, Nikita Khrushchev, gave a Secret Speech in 1956 attacking Stalin's brutal rule, and began pursuing peaceful co-existence with the West instead of confrontation.

Mao was furious on both counts. He saw criticising Stalin as a dangerous betrayal of revolutionary discipline — after all, Mao ran China the same way, with a personality cult of his own. And 'peaceful co-existence' looked to Mao like cowardice, giving up the fight against capitalism just when China needed Soviet backing most.

Argument two: land and borders: Ideology was not the only problem. China and the USSR shared a huge, poorly defined border, much of it fixed by treaties Tsarist Russia had forced on a weak China in the 1800s. Mao wanted those old borders renegotiated; the Soviets refused to give an inch.

Zhenbao Island clashes, March 1969: Tension exploded into actual fighting on Zhenbao Island (called Damansky Island by the Soviets), a tiny, disputed spot in the frozen Ussuri River. Chinese and Soviet troops fought several bloody skirmishes there in March 1969, leaving dozens dead on each side.

Both nuclear-armed communist states now had soldiers shooting at each other on their shared border.

How this is tested (Paper 2): Examiners want you to show communism was not one bloc. Use the Sino-Soviet split to argue that Cold War alliances were driven by national interest, not just shared ideology — two communist giants very nearly went to war with each other in 1969.

By 1969, Mao faced a frightening question: with the USSR now a hostile, nuclear-armed neighbour bristling with troops on the border, could China really afford to also treat the USA as an enemy?

Across the Pacific, President Richard Nixon and his national security adviser Henry Kissinger were asking the mirror-image question. If China and the USSR distrusted each other this badly, could Washington use that split to its own advantage?

The logic of rapprochement: Both sides had reasons to talk. China wanted a counterweight against Soviet pressure on its border. The USA wanted leverage over Moscow and a way out of the Vietnam War, since China could pressure North Vietnam to negotiate. This slow thaw is often called rapprochement.

Ping-pong diplomacy, April 1971: The first public sign of a thaw was almost comically small. At a table-tennis championship in Japan, the American team was unexpectedly invited to visit China — the first US sports team allowed in since 1949. Photographs of US and Chinese players laughing together made headlines worldwide and signalled that something serious was shifting behind the scenes.

The Shanghai Communiqué, February 1972: At the end of the visit, both governments signed the Shanghai Communiqué. The USA acknowledged that Taiwan was part of 'one China' without fully abandoning its old ally, and both sides agreed to expand trade and cultural contact. Full diplomatic recognition was left for later — Taiwan remained a delicate, unresolved sticking point.

Triangular diplomacy: Kissinger's term for this strategy was triangular diplomacy: by warming to Beijing, Washington reminded Moscow it was not the USA's only option. Just months later, in 1972, the USSR signed SALT I with the USA — détente and the China opening were closely linked.

Full normalisation, 1 January 1979: The relationship kept warming after Nixon. Under President Jimmy Carter and China's new leader Deng Xiaoping, the USA and PRC finally established full diplomatic relations on 1 January 1979, ending 30 years of non-recognition. As part of the deal, Washington cut official diplomatic ties with Taiwan, though informal and trade links continued.

How this is tested (Paper 2): This content answers questions on 'the role of China in the Cold War' or 'reasons for changing superpower relations, 1947–1979'. Always show the cause-and-effect chain: Sino-Soviet split → China needs a counterweight → USA needs leverage over the USSR → rapprochement → this pressures Moscow into détente. Don't describe Nixon's visit in isolation from the split that made it possible.