they tested it in august 1949
It showed that the USSR had nuclear weapons.
1949 thru 1950 prompted by USSR atomic bomb test.
USSR
How did truman react to ussrs deployment of an atomic bomb
USSR
no, but they were involved as couriers to leak information on the bomb to the USSR.
The atomic bomb test
USSR
The USSR successfully detonates its first atomic bomb at a remote test site at Semipalatinsk in Kazakhstan code named "First Lightning ."
Russia (USSR) declared war on Japan right after the Hiroshima bomb.
The cold war intensified when the USSR tested their bomb in 1949.
The atomic bomb test site was named the Trinity Test Site. It was located in New Mexico, USA, and was where the first atomic bomb was successfully detonated on July 16, 1945.