Despite the extensive literature tackling the issue of Cold War crises, it is Berlin that remains the focal point of Europe and the climax of this long-lasting political conflict. It was quite obvious that the 1945 postwar race for Berlin and its sphere of influence will not end with the amicable agreement between the Western Allies and the Soviet Union. In the summer of 1948, several years of tensions that started with the Yalta Conference in 1945, resulted in the Berlin blockade - the first climax of the Cold War. As a consequence, this created an even greater gap between East Germany controlled by the Soviets and West Germany which evidently developed more successful economically and socially under the influence od the Allies. This paper will explain in more detail the events that led to 1948 and 1961 crises, their course, as well as a peaceful, yet the incoherent period of stagnation between the climaxes of the Cold War. The aim of this paper is to display how the crises were overcome and the presence of the realistic theory of international affairs which dominated during the Cold War competitions. The purpose of this overview is a scientific contribution to the theme of the Cold War, depicting the geopolitical, military-economical and cultural partition of Germany and the coexistence of its citizens. The Berlin crises, a symbol of the world block division mark the phenomenon of ideological as well as literal - geographical polarization of society. The consequences of this separation have left an immense mark in one of the largest cities in Europe.