The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, which began following World War II. Historians do not fully agree on its starting and ending points, due to recent Russian activity, but the First Cold War is generally considered to span the 1947 Truman Doctrine (12 March 1947) to the 1991 dissolution of the Soviet Union (26 December 1991).
The term cold war is used because there was no large-scale fighting directly between the two superpowers, but they each supported major regional conflicts known as proxy wars, which continues to this date. The conflict was based around the ideological and geopolitical struggle for global influence by these two superpowers, following their temporary alliance and victory against Nazi Germany in 1945.
Aside from the nuclear arsenal development and conventional military deployment, the struggle for dominance is expressed via indirect means such as psychological warfare, propaganda campaigns, fake news, espionage, embargoes, economic sanctions, rivalry at sports events, cyberwars and technological competitions such as the Space Race.
In the recent years more countries achieved nuclear weapon powers with total nukes count in the world for year 2022 of 13,080. This puzzle game speculates with possible alignment of the atomic countries.
Here is a map of all the participants.