Fearing a joint German-Japanese attack in the 1930s, Stalin used his influence to force Chinese Nationalists and Communists into a united front. This provoked Japan into a massive, costly invasion of China in 1937, tying down Japanese forces so they could not threaten the Soviet Union.
Once Chinese intervention in the Korean War created a stalemate, Stalin saw the conflict as a perfect opportunity. He believed it would drain American resources and delay China's rise, all while keeping Russia out of direct conflict—a low-risk, high-reward strategy of "fighting to the last Chinese."
Historically, Russia and China's strategy as continental empires involves avoiding two-front wars and actively destabilizing neighboring states. This creates buffer zones and prevents any single power from becoming a threat on their borders, ensuring their own security through regional instability.
Historically, rising and ruling powers don't stumble into war directly. Instead, their heightened distrust creates a tinderbox where a seemingly minor incident involving a third party (like the assassination in Sarajevo pre-WWI) can escalate uncontrollably into a catastrophic conflict.
In the final weeks of WWII, the Soviet Union invaded Manchuria and dismantled its industrial infrastructure, shipping home the vast majority of its power, mining, and metalworking equipment. This industrial base should have gone to China, which had fought Japan for 15 years, not Russia.
Both nations use nationalism to rally support and distract from domestic failings. But this approach is a "heady drink" with severe downsides: it repels internal minorities, pushes neighbors to form counter-alliances, and makes it politically difficult to de-escalate international crises.
The popular image of a strong, friendly Sino-Soviet bond originated with the 1919 Karahan Manifesto, where Bolsheviks promised to return lands seized by the Tsars. They later reneged on this promise, but the propaganda successfully masked Russia's own continued imperial ambitions in China.
The core national anxieties of Russia and China are opposites, shaping their strategic cultures. Russia's history of devastating invasions fuels its fear of external threats (the "Mongol yoke"). China, haunted by centuries of civil war, fears internal chaos and the collapse of the state above all else.
Throughout the 19th and 20th centuries, Russia consistently manipulated China during its moments of weakness. It offered "mediation" in conflicts like the Opium Wars that ultimately served Russian interests by keeping China destabilized and forcing it to cede territory.
Soviet leaders who lived through WWII understood the unpredictability of direct conflict and preferred proxy wars. Vladimir Putin, in contrast, has consistently used direct "hot wars"—from Chechnya to Georgia to Ukraine—as a primary tool to consolidate power and boost his domestic popularity.
President Xi Jinping used a phone call with President Trump not just for bilateral issues, but to strategically signal displeasure with Japan's hawkish stance on Taiwan. This "shadow play" diplomacy shows China leveraging its relationship with the U.S. to indirectly manage and warn other nations, making the U.S. a channel for its geopolitical messaging.