The Soviets tested their first A-Bomb in 1949; one year before the start of the Korean War (1950-1953).
The US. The USSR stole our plans to make their first bombs.
1949 when the USSR tested their first atomic bomb.
officially - 1949 when USSR tested their first atomic bombactually - ~1944 when spies stole US atomic bomb plans and delivered them to the KGB
The atomic bomb was invented in 1933 (by Leo Szilard) and finally built in 1945 (by the US Manhattan Project, which involved hundreds of thousands of people). It was duplicated in 1949 (by the USSR, assisted by information from spies in the US project). It was already in "mass production" by both the US and USSR by the early 1950s , thus not invented by anyone in the 1950s.
The United States government was deeply penetrated with Soviet spies. Even one of the senior scientists on the Manhattan Project itself was a communist agent who regularly passed information along to Moscow. Stalin knew all about it. Michael Montagne Stalin holded a meeting with USSR famous scientists in 1942 , researched A- bomb ! USSR knowed A-bomb by Britain USSR understanded that make A-bomb by USA
USSR
How did truman react to ussrs deployment of an atomic bomb
USSR
they tested it in august 1949
no, but they were involved as couriers to leak information on the bomb to the USSR.
USSR
Russia (USSR) declared war on Japan right after the Hiroshima bomb.
The cold war intensified when the USSR tested their bomb in 1949.
The US. The USSR stole our plans to make their first bombs.
It showed that the USSR had nuclear weapons.
I dont understand the question. why would America having the atomic bomb stop the USSR from spreading communism? Because if so it didn't. It spread to Cuba,Yugoslavia, North Korea, Plus parts of South Africa. While the US had the Atomic bomb.
1949 thru 1950 prompted by USSR atomic bomb test.