The united states and the soviet union were allies during wwii. after it ended, why did we go from this alliance to the cold war? why did the nations start opposing each other? what were a few ways the nations disagreed?


Both countries thought they where better and bigger than the other. They opposed each other to see which one was stronger and more powerful. The USSR believed communism was the best and the U.S though it was democracy. The placement of nuclear missiles was also a disagreement. Invading nations to maintain superior in that general location also aroused disagreement.

I hope this helps! :)

   Confronted views in state systems resulting in a arms race, space program, and polarization into two opposing blocks

Explanation:  During the Second World War, the United States and the Soviet Union were allies, which is quite normal, because in a situation when an enormous evil such as Nazism threatened, the differences between the two sides do not stand out, but the common interest of the defense against this evil. When Nazism is defeated and when things slowly return to the restoration and construction of everything that was destroyed during the war by evil, it is also normal for each side to have a vision of establishing a system in the new-old states that need to be rebuilt, both economically and politically. Then all those differences that have been suppressed in the common interest, begin appear on the surface, and become bigger. The Americans wanted to conduct democratic elections in all countries, while the Soviets wanted to impose communism in Eastern European states for their belief in the World Revolution.

The Americans did not want to allow the spread of communism, and one of the consequences of this prevention was the formation of the NATO military alliance of the Western states together with the US. Again, the USSR forms the Warsaw Pact as a response, and thus begins to cool the relationship. There is then a arms race, a space program, helping smaller  countries in war, and so on.

There were a lot of factors. To start, the United States started pushing for Democracy, while the soviet union was obviously communist

These two systems are polar opposites, and because of those differences, there was obviously conflict between the two even during WWII (although yes, they were technically allies)

Oh yeh, and both sides had nukes now after WWII. Which meant we started pointing them at each other. And seeing who would pull the trigger first (Mutually assured destruction: you shoot a nuke at me, I'll shoot all mine at you) believe it or not, MAD was pretty effective at keeping the peace during the cold war.

But in 1950-1953, just a few years after WWII ended, South Korea (backed by the US) and North Korea (backed by communist China, soviet union) went to war (North invaded the South). We sent "ambassaders" to the South so they wouldn't be taken over by communists, but everyone knew they were really just soldiers. This is the beginning of "containment"

We wanted to "contain" communism. It started with the Korea War, and was cited as reason to become involved in Vietnam 10 years later. 

TO SUMMARIZE: We went from an alliance to the Cold War because of our differing views on how the government and the economy should operate (Capitalism, vs Communism)

Nations started opposing each other because they were forced to ally with the United States, who was trying to spread Democracy, or with the Soviets, who were spreading communism.

Nations mainly disagreed on how their economies and governments should be run, which ultimately determined who they sided with during the cold war. 

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