What Western nickname was given to the Soviet invasion of Japanese-held Manchuria in 1945?

The Western nickname for the Soviet invasion of Japanese-held Manchuria in 1945 was Operation August Storm. The campaign began on August 9, shortly before the bombing of Nagasaki.

The Soviet operation is more formally called the Manchurian Strategic Offensive Operation or the Manchurian Operation. Soviet forces attacked Japanese-held Manchuria and the puppet states of Manchukuo and Mengjiang from several directions.

The offensive overwhelmed the Japanese Kwantung Army and also extended into Inner Mongolia, southern Sakhalin, and northern Korea. The speed and scale of the campaign made it a major factor in the final crisis facing Japan's leaders.

Operation August Storm is a later Western label rather than the official Soviet wartime name. It should not be confused with Operation Downfall, the canceled Allied plan for invading Japan's home islands.