Question: When did the Operation that seized the territories formally claimed by  Manchukuo began
Sentence (from "Soviet invasion of Manchuria"): "Manchzhurskaya Strategicheskaya Nastupatelnaya Operaciya") or simply the Manchurian Operation ("Маньчжурская операция"), began on 9 August 1945 with the Soviet invasion of the Japanese puppet state of Manchukuo.
Relevant evidence: Yes