Republic of China (1912–49) in the context of "Cash (Chinese coin)"

The surrender of the Empire of Japan in World War II was announced by Emperor Hirohito on 15 August and formally signed on 2 September 1945, ending the war. By the end of July 1945, the Imperial Japanese Navy (IJN) was incapable of conducting major operations and an Allied invasion of Japan was imminent. Together with the United Kingdom and China, the United States called for the unconditional surrender of Japan in the Potsdam Declaration on 26 July 1945—the alternative being "prompt and utter destruction". While publicly stating their intent to fight on to the bitter end, Japan's leaders (the Supreme Council for the Direction of the War, also known as the "Big Six") were privately making entreaties to the publicly neutral Soviet Union to mediate peace on terms more favorable to the Japanese. While maintaining a sufficient level of diplomatic engagement with the Japanese to give them the impression they might be willing to mediate, the Soviets were covertly preparing to attack Japanese forces in Manchuria and Korea (in addition to South Sakhalin and the Kuril Islands) in fulfillment of promises they had secretly made to the US and the UK at the Tehran and Yalta Conferences.

On 6 August 1945, at 8:15 am local time, the United States detonated an atomic bomb over the Japanese city of Hiroshima. Sixteen hours later, American president Harry S. Truman called again for Japan's surrender, warning them to "expect a rain of ruin from the air, the like of which has never been seen on this earth." Late on 8 August 1945, in accordance with the Yalta agreements, but in violation of the Soviet–Japanese Neutrality Pact, the Soviet Union declared war on Japan, and soon after midnight on 9 August 1945, the Soviet Union invaded the Japanese puppet state of Manchukuo. Hours later, the U.S. dropped a second atomic bomb on the Japanese city of Nagasaki.

The Burma campaign in the South-East Asian theatre of World War II was fought primarily by British Commonwealth, China and United States forces against the forces of Imperial Japan, who were assisted by the Burmese National Army, the Indian National Army, and to some degree by Thailand. The British Commonwealth land forces were drawn primarily from the United Kingdom, British India and Africa.

Partly because monsoon rains made effective campaigning possible only for about half of the year, the Burma campaign was almost the longest campaign of the war. During the campaigning season of 1942, the Japanese had conquered Burma, driving British, Indian and Chinese forces from the country and forcing the British administration to flee into India. After scoring some defensive successes during 1943, they then attempted to forestall Allied offensives in 1944 by launching an invasion of India (Operation U-Go). This failed with disastrous losses.

The January 28 incident or Shanghai incident (January 28 – March 3, 1932) was a conflict between the Republic of China and the Empire of Japan. It took place in the Shanghai International Settlement which was under international control. In apparent response to a mob attack on Japanese Buddhist monks, the Japanese in Shanghai rioted and burned down a factory, killing two Chinese. Heavy fighting broke out, and China appealed to the League of Nations. A truce was finally reached on May 5, calling for Japanese military withdrawal, and an end to Chinese boycotts of Japanese products. It is seen as the first example of a modern war waged in a large city between two heavily equipped armies and as a preview of what was to come during the Second World War.

The episode helped undermine civilian rule in Tokyo; Prime Minister Inukai Tsuyoshi was assassinated on May 15, 1932.

The historical Kuomintang socialist ideology is a form of socialist thought developed in mainland China during the early Republic of China. The Tongmenghui revolutionary organization led by Sun Yat-sen was the first to promote socialism in China.

Otto Braun (28 September 1900 – 15 August 1974) was a German communist journalist and functionary of the Communist Party of Germany with a long and varied career. His most significant role was as a Comintern agent sent to China in 1934 to advise the Chinese Communist Party (CCP) on military strategy during the Chinese Civil War. At the time Braun adopted a Chinese name, Li De (Chinese: 李德; pinyin: Lǐ Dé). It was only many years later that it became known that Otto Braun and "Li De" were the same person.

The Twenty-One Demands (Japanese: 対華21ヶ条要求, romanized: Taika Nijūikkajō Yōkyū; simplified Chinese: 二十一条/廿一条; traditional Chinese: 二十一條/廿一條; pinyin: Èrshíyī tiáo) was a set of demands made during the First World War by the Empire of Japan under Prime Minister Ōkuma Shigenobu to the government of the Republic of China on 18 January 1915. The secret demands would greatly extend Japanese control of China. Japan would keep the former German leased territory it had conquered at the start of World War I in 1914 and would be strong in Manchuria and South Mongolia while having an expanded role in railways. The most extreme demands (in section 5) would give Japan a decisive voice in finance, policing, and government affairs. The last part would make China in effect a protectorate of Japan, and thereby reduce Western influence.

Japan was in a strong position during the course of the war as the Allies were in a stalemate with their rivals, the Central Powers. The United Kingdom and Japan had a military alliance since 1902, and in 1914, the UK had asked Japan to enter the war. China published the secret demands, upsetting the Americans and British. They were sympathetic and forced Japan to drop section 5 in the final 1916 settlement. Japan gained little in China and lost a great deal of prestige and trust from both the United Kingdom and the United States.

The Burma campaign was a series of battles fought in the British colony of Burma as part of the South-East Asian theatre of World War II. It primarily involved forces of the Allies (mainly from the British Empire and the Republic of China, with support from the United States) against the invading forces of the Empire of Japan. Imperial Japan was supported by the Thai Phayap Army, as well as two collaborationist independence movements and armies, The State of Burma and the Provisional Government of Free India. Nominally independent puppet states were established in the conquered areas and some territories were annexed by Thailand. In 1942 and 1943, the international Allied force in British India launched several failed offensives to retake lost territories. Fighting intensified in 1944, and British Empire forces peaked at around 1 million land and air forces. These forces were drawn primarily from British India, with British Army forces (equivalent to eight regular infantry divisions and six tank regiments), 100,000 East and West African colonial troops, and smaller numbers of land and air forces from several other Dominions and Colonies. These additional forces allowed the Allied recapture of Burma in 1945.

The campaign had a number of notable features. The geographical characteristics of the region meant that weather, disease and terrain had a major effect on operations. The lack of transport infrastructure placed an emphasis on military engineering and air transport to move and supply troops, and evacuate wounded. The campaign was also politically complex, with the British, the United States and the Chinese all having different strategic priorities. It was also the only land campaign by the Western Allies in the Pacific Theatre which proceeded continuously from the start of hostilities to the end of the war. This was due to its geographical location. By extending from South East Asia to India, its area included some lands which the British lost at the outset of the war, but also included areas of India wherein the Japanese advance was eventually stopped. The climate of the region is dominated by the seasonal monsoon rains, which allowed effective campaigning for only just over half of each year. This, together with other factors such as famine and disorder in British India and the priority given by the Allies to the defeat of Nazi Germany, prolonged the campaign and divided it into four phases: the Japanese invasion, which led to the expulsion of British, Indian and Chinese forces in 1942; failed attempts by the Allies to mount offensives into Burma, from late 1942 to early 1944; the 1944 Japanese invasion of India, which ultimately failed following the battles of Imphal and Kohima; and finally the successful Allied offensive which liberated Burma from late 1944 to mid-1945.

Japan participated in World War I from 1914 to 1918 as a member of the Allies/Entente and played an important role against the Imperial German Navy. Politically, the Japanese Empire seized the opportunity to expand its sphere of influence in China, and to gain recognition as a great power in postwar geopolitics.

Japan's military, taking advantage of the great distances and Imperial Germany's preoccupation with the war in Europe, seized German possessions in the Pacific and East Asia, but there was no large-scale mobilization of the economy. Foreign Minister Katō Takaaki and Prime Minister Ōkuma Shigenobu wanted to use the opportunity to expand Japanese influence in China. They enlisted Sun Yat-sen (1866–1925), then in exile in Japan, but they had little success. The Imperial Japanese Navy, a nearly autonomous bureaucratic institution, made its own decision to undertake expansion in the Pacific area. It captured Germany's Micronesian territories north of the equator, and ruled the islands until they were transitioned to civilian control in 1921. The operation gave the Navy a rationale for enlarging its budget to double the Army budget and expanding the fleet. The Navy then gained significant political influence over national and international affairs.