NATO was established seventy years ago, in 1949, in order to block the ideological and political influence of socialism and the Soviet Union, which had greatly increased after the Second World War, as well as its military power. As of its establishment, NATO became one of the headquarters of anti-communism and an imperialist alliance aimed to stop the rise of the working class. Their war policies of relentless military harassment threatened with direct military attacks, including nuclear ones, against the countries that were building socialism, which was answered in May 1955 with the signing of the Treaty of Friendship, Cooperation and Mutual Assistance in Warsaw.