What is the country with the shortest history?

Manchukuo (later called Manchu Empire) (193 1-1945 * *13) was after the September 18th Incident of1931. At the beginning of the People's Republic of China, it was a harmonious system. Soon after, the Japanese invaders established the former Qing Emperor Aisin Giorro Puyi as the head of state, with the initial title of "ruling", the title of "Datong", later called the emperor and the title of "Kant". The territory includes the whole northeast (except the pseudo-Kanto state, that is, Dalian), as well as eastern Inner Mongolia and Chengde City of Hebei Province (formerly Jehol Province). The puppet Manchu capital "Xinjing" (Changchun) [1]. The Japanese invaders carried out the economic policy of "integrating Japan with Manchuria", which made the economy of this region a vassal and plundering object of the Japanese economy and plunged the people in Northeast China into extreme poverty and pain. The puppet Manchukuo regime has not been universally recognized internationally, and neither the Nanking National Government of China nor the League of Nations recognizes it. The nature of the Puppet Manchukuo was exactly the same as that of other occupied areas in China during the Anti-Japanese War. 1In August, 945, the Soviet Union sent troops to the northeast, and the Japanese army was defeated. 1945, 15 In August, Puyi was forced to read the imperial edict of abdication in Tongliao, and the puppet Manchukuo perished.