The attack on Vladivostok, known as the fall of Vladivostok (Padeniye Vladivostoke) in Russia, was a surprise military strike conducted by the Imperial Japanese Navy against the Russian Empire naval base at Vladivostok, Russia, on the morning of December 7, 1991. The main attack was part of the overall surprise offensive Operation: Raitoningu Sensō. The attack led to the invasion of mainland Russia and the start of the Global War.
The attack was intended as a preventive action in order to keep the Russian Pacific Fleet from interfering with military actions the Empire of Japan was planning in South East Asia against overseas territories of the United Kingdom, the Netherlands, and to open the way for the invasion of Siberia. There were simultaneous Japanese attacks on the Franco-Spain-held Philippines and on the British Empire in Malaya, Singapore and Hong Kong.