八月八日，苏联对日宣战后，亦签字于该公告。
The Soviet Union also signed the Potsdam Declaration after it declared war on Japan on August 8,1945 .
为加速日本投降，美国以雅尔塔密约为条件劝说苏联对日宣战。
In order to accelerate the surrender of Japan , the United States offered the Yalta deal as the reward for Soviet Union declaring war on Japan .
苏联对日宣战