I must wonder greatly about the atomic bombing of Shanghai and Tianjin - akin to the
developments OTL that would eventually settle the final bombing locations to Hiroshima and Nagasaki, how did they settle on choosing Shanghai and Tianjin?
Here you go, a bit on the East Asian War and the atomic bombings. Hopefully it answers your questions.
Thanks to
@Wayside for some of the info in the atomic bombings box and write up
The
East Asian War, also called the
Asia–Pacific War, was the theatre of the Second World War that was fought in Asia, over a vast area that included mainland China, the Northern Pacific Ocean, Southeast Asia and the islands of northern Oceania. It was fought primarily between the Allied Powers, led by Japan and the British Empire, and Kuomintang China, along with its client and puppet states, and lasted for eight and a half years from July 1937 to February 1946.
Kuomintang China had been engaged in numerous "Wars of Expansion" with its neighbouring countries since 18 September 1931, when the Chinese invaded Manchuria. The East Asian War is widely accepted to have begun on 7 July 1937, when the Chinese invaded northern Korea and attacked the Japanese-controlled Kwantung Territory, the British possession of Hong Kong as well as British military and naval bases in the Philippines. By June 1938, China controlled Korea, Hong Kong and Kwantung and had begun an air and sea blockade against Japan, known as the Battle of Japan.
In September 1940, China officially became part of the Axis Powers, and seized French Indochina from the puppet Vichy government. By 1941, with the outbreak of the Eastern Front in Europe between Nazi Germany and the Soviet Union, Chinese forces pushed into the Soviet Far East, Mongolia and Xinjiang, beginning the Far Eastern Front. With the occupation of Indochina, the Kuomintang government began to plan for attacks against the Philippines, the Kingdom of Sarawak and other British colonial possessions in Southeast Asia. On 8 December 1941, Chinese forces launched attacks on British Commonwealth forces in Malaya, Sarawak, Sulu and the Philippines. Chinese forces simultaneously invaded southern and eastern Thailand, and within 5 hours the Thai government signed an armistice and allied with China.
By January 1942, Malaya had fallen to Chinese forces and much of the Philippines were occupied. General Douglas MacArthur had withdrawn his forces to Singapore, beginning the Chinese siege of the island fortress that would last intermittently until the end of the war. By March, Allied forces in the Philippines had surrendered, and Chinese forces had invaded and occupied British Burma, the islands of Borneo and Sulawesi in the Dutch East Indies and much of New Guinea and the Solomon Islands. The Chinese also launched probing air raids on Batavia, capital of the Dutch East Indies, as well as Port Moresby in British New Guinea and cities along the coast of Northern Australia. A planned Chinese invasion of New Guinea and Australia was defeated during the Battle of the Coral Sea in May 1942.
In late 1944 and early 1945, Allied forces launched campaigns and military landings across Southeast Asia, including Burma, the Dutch East Indies, and the Philippines. Reinforcements in Malaya helped break the siege of Singapore, and by May 1945 Chinese forces in Southeast Asia had been forced to retreat from major cities as the Allies secured key staging areas for the push into Mainland China. A combined British Commonwealth and Japanese Army invasion liberated Taiwan after a 123-day battle, one of the most costly battles of the war, and landings at Incheon in western Korea established bases for a planned two-pronged attack of Mainland China. The Soviet invasion of Manchuria on 9 August 1945 further strained Chinese forces in the northeast.
With the threat of a costly and lengthy land invasion of China, the Allies began a campaign of aerial bombings against Chinese military targets. The war culminated in the atomic bombings of Shanghai and Tianjin, and the death of Chiang Kai-shek, resulting in the Chinese announcement of intent to surrender on 21 January. The formal surrender of China ceremony took place aboard the battleship HMS
Missouri in Bohai Bay on 2 February 1946. After the war, China lost all rights and titles to its former possessions in Asia and the Pacific, and its territory was jointly-occupied by the five principal Allied Powers. Constitutional changes, along with cultural and political reforms and tension between democrats and communists would eventually trigger the outbreak of the Chinese Civil War.
The
atomic bombings of Shanghai and Tianjin took place during the final stage of the East Asian theatre of the Second World War, when the United Empire detonated two nuclear weapons over the Chinese cities of Shanghai and Tianjin on 8 and 11 January 1946, respectively. The two bombings killed between 575,000–700,000 people, most of whom were civilians.
In the final year of the war, the Allies prepared for a costly invasion of the Chinese mainland, preceded by a firebombing campaign that decimated coastal cities, including Peking (now Beijing) which forced the nationalist government to relocate to Tianjin. The war in Europe had concluded with the surrender of Spain on 11 March 1945, and Germany two months later on 8 May 1945. The Allies called for the unconditional surrender of the Chinese armed forces, or face "prompt and utter destruction". When Kuomintang China refused, British Prime Minister Harry Truman famously promised them "utter annihilation".
By November 1945, the Allies' Islington Project had produced two types of atomic bombs, and orders were issued for them to be used on four Chinese cities, after the British obtained the consent of California and Texas, as required by the Detroit Agreement. Five potential targets were originally selected: Guangzhou, a major manufacturing and munitions hub; Beijing, the capital with important symbolic value; Nanjing, a major industrial centre; Tianjin, a major port city and the site of military and civilian headquarters; and Shanghai, a port city with industrial and military facilities. Beijing was removed from the list for its historic and cultural significance, whilst the other four remained on the list, with Shanghai and Tianjin prioritised.
On 8 January, a British Royal Air Force Boeing B-29 Superfortress, nicknamed
Great Artiste, dropped a Tall Man uranium gun-type bomb on Shanghai. Tens of thousands of civilians were killed instantly by the explosion and firestorm, along with numerous soldiers and government officials, including President Chiang Kai-shek, who was visiting the city to boost morale. His death triggered a brief power struggle between the military and civilian leadership of the Kuomintang, with many rallying behind He Yingqin and Soong Tse-ven in Tianjin and Nanking respectively. Three days later, on 11 January, an Old Bridge plutonium implosion-type bomb was dropped on Tianjin, killing He Yingqin and many of his supporters.
The bombs immediately devastated their targets, and planned bombings of Guangzhou and Nanjing were postponed while the subsequent chaos wracked Kuomintang China. Over the next two to four months, the acute effects of the atomic bombings killed approximately 330,000 people in Shanghai and 245,000 in Tianjin; roughly a quarter of the deaths occurred on the first day, with large numbers of people dying from the effects of burns and radiation sickness, compounded by illness and malnutrition.
China announced its surrender to the Allies on 21 January, ten days after the bombing of Tianjin. On 2 February, the Chinese government of Soong Tse-ven signed the instrument of surrender, effectively ending the East Asian War and the Second World War. The bombings remain the only two instances of nuclear weapons being used in warfare in world history, and the ethical and legal justification for the bombings is still debated to this day.