Respuesta :
The correct answer is "unconditional surrender by Japan".
After the bombing of the Japanese city of Hiroshima on August 6th, 1945, the end of the World War was seemingly inevitable, due to overpowering of the American Navy over the Japanese Navy in the War of the Pacific and the mass destruction caused in the mentioned city after the bombing. These leaflets helped to disseminate the already existent panic among Japanese Society, as they were gradually coming into senses that the war was coming to an end.
After succumbing to the intense military pressure from the Allies, the Empire of Japan decided to surrender 9 days later, on August the 15th.