The Soviet Union announced their neutrality on September 29, 1939, when thry made the Treaty of Friendship with the Germans.
April 5, 1945
i have know idea what this answer is
August 8, 1945
Declare independence from the Soviet Union.
The Soviet Union (Russia) did NOT declare war on Japan until 1945.
LITHUANIA was the first of the Soviet Republics to declare independence and did so on March 11, 1990.
Germany invaded the USSR after it conquered Poland.