Manchukuo
The puppet state Japan carved out of Manchuria in 1932, ruled in name by the last Qing emperor but controlled by the Kwantung Army.
On paper, Manchukuo was an independent empire with its own flag, capital, currency, and emperor. In reality it was a colony run by the Japanese army, the first and largest piece of the empire Japan meant to build across Asia. From 1932 to 1945 it occupied the northeast of China, an area larger than France and Germany combined, and it served as both a resource base and a laboratory for how Japan would rule conquered land. Manchukuo was the prototype, the showpiece Japan pointed to when it promised a new order in Asia.
From the Mukden Incident to a throne
The seizure was engineered, not ordered. On the night of 18 September 1931, officers of Japan's Kwantung Army detonated a small charge on the South Manchuria Railway near Mukden, blamed Chinese soldiers, and used the staged attack as a pretext to overrun all of Manchuria within months. Tokyo had not approved the operation, but the conquest was popular at home and the government fell into line. In March 1932 Japan declared the territory the independent state of Manchukuo, and in 1934 it installed Puyi, the last Qing emperor, who had lost the Chinese throne as a child in 1912, as its figurehead ruler. He wore a Western uniform to an enthronement stage-managed by his Japanese minders. He signed what he was told to sign and reigned over nothing.
A colony dressed as a country
Real power lay with the commander of the Kwantung Army, who doubled as Japan's ambassador to the state he controlled. Behind the fiction, Japan poured in investment. It built railways, steel mills, and hydroelectric dams, mined the region's coal and iron, and turned Manchukuo into one of Asia's most industrialized zones. The capital, Changchun, was rebuilt and renamed Hsinking, the 'new capital,' with broad boulevards and modern ministries. Hundreds of thousands of Japanese settlers were moved in on land taken from Chinese farmers. The control was brutal: forced labor, a pervasive secret police, and, near Harbin, the covert Unit 731, which ran a biological-warfare program that experimented lethally on prisoners. The 'kingly way' of racial harmony that Manchukuo advertised was propaganda stretched over an occupation.
Gone in a week
The state that took thirteen years to build collapsed in barely a week. On 9 August 1945, in the final days of the war, some 1.5 million Soviet troops poured across the borders in a massive offensive. The Kwantung Army, hollowed out by transfers to the Pacific, disintegrated. Puyi was captured trying to flee to Japan and handed to the Soviets, then to Communist China, where he ended his life as a re-educated gardener. Manchukuo vanished from the map as suddenly as it had appeared, recognized to the end by almost no one but Japan and its allies. The League of Nations had refused to recognize it in 1933, and Japan answered by walking out of the League. It remains the template for what Japan's promised 'co-prosperity' meant in practice: a country in name, a colony in fact.