Eighty years ago today, on April 5, 1945 (February 23, 1945 in the lunar calendar), the Soviet Union announced the abolition of the Soviet-Japanese Neutrality Treaty. In 1945, both Germany and Japan lost ground on the battlefield. In view of this, the Soviet Union unilaterally announced the abolition of the Soviet-Japanese Neutrality Treaty on April 5, 1945, and declared war on Japan on August 8. The Soviet Army established the Far East Soviet Army Headquarters with Marshal Vasilevsky as the commander-in-chief to launch the Far East Campaign. By September 2, Japan officially signed its surrender, and the Soviet army annihilated about 700,000 Kwantung Army, Puppet Manchukuo Army, and Puppet Mongolian Army. In 1940, Hitler stepped up preparations for an eastward attack, and the western Soviet Union was seriously threatened. In order to concentrate its efforts on Germany, the Soviet Union urgently needed to stabilize Japan so as not to fall into the predicament of fighting on the east and west fronts. At this time, Japan, which has determined its' southward policy ', is also eager to adjust Japan-Soviet relations. After negotiations, the two sides signed the Soviet-Japanese Neutrality Treaty in Moscow on April 13, 1941. The main contents of the Soviet-Japanese Neutrality Treaty are: 'Both contracting parties undertake to maintain peaceful and friendly relations between them and to respect each other's territorial integrity and inviolability of the other contracting party'; 'If one contracting party becomes the object of war between one or more states of a third party, the other contracting party will remain neutral throughout the course of the conflict'. The treaty is valid for five years. When the Soviet Union and Japan signed the neutrality treaty, they also issued a statement at the same time, declaring that 'the Soviet Union promises to respect the territorial integrity and inviolability of Manchukuo, and Japan promises to respect the territorial integrity and inviolability of the Mongolian People's Republic'. The Soviet government's statement on 'Manchukuo' undoubtedly sacrificed China's interests. However, the Kuomintang and the Communist Party focused on the overall situation and remained friendly with the Soviet Union. The neutrality treaty signed between the Soviet Union and Japan was not implemented to the end. The puppet Manchukuo was finally overthrown by the Soviet Red Army, and Pu Yi, the emperor of Manchukuo, was also captured by the Soviet army and eventually extradited to China. Comments: The so-called treaty is just a piece of waste paper, which can be torn up at any time when it is not needed. Two bears.