According to the article on the cold war, what happened in 1917 that put a large strain on relations between the us and the soviet union? a. the soviet union threatened the us with war. b. the us threatened the soviet union with war. c. the us and the soviet union entered world war i on opposite sides. d. a communist dictatorship was established in russia after a revolution.

The correct answer is "D".

The October Revolution was the final event that led to the complete ousting of the Russian Monarchy from power in Russia on October 25th, 1917. This process started during the February Revolution, which forced the Tsarist autocracy of Tsar Nicholas II out of power. A provisional government led by Nicholas's younger brother Michael was put into place. Until that time, Russia had cordial relations with the US, as it had sided with them during the First World War. However, with the rise of Lenin and foundation of the Soviet Union relations would stiffen until nowadays, as Lenin's political views (Communism) were greatly different from those of the US (Capitalism).

d.) a communist dictatorship was established in russia after a revolution

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