In 1949, the USSR carried out its first nuclear test, and in 1953, 9 months after the American test, its hydrogen bomb test. The conflict between the US and the USSR seemed increasingly real and the world was faced with the risk of nuclear destruction. Meanwhile, in 1949, the North Atlantic Treaty Organization (NATO) was established to defend its allies against the attack of the USSR. In 1955, the Federal Republic of Germany was admitted to the NATO Alliance. In response, in the same year Moscow established the Warsaw Pact, the military alliance of the Eastern Bloc countries. Being aware that a direct confrontation between the two powers will end in nuclear annihilation, a series of the so-called substitute wars took place, in which both the fighting powers competed indirectly.
The first conflict was the Korean war (1950-1953). North Korean communists under Kim Ir Sen, supported by the USSR and China, fought against South Koreans, supported by UN troops that were mostly American. Both Korean countries have sought to unite Korea under their banner. After the signing of the truce in 1953, the pre-war territorial status quo was restored, and the Korean Peninsula has remained divided to this day along the 38th parallel into a communist state in the north and a democratic state in the south.
Ships with weapons from the USSR flowing to Cuba.
Castro and Khrushchev remained in good relations despite the considerable autonomy it displayed towards the great brother Kuba.