Why did the united states assert itself as a world power?

Well this is an opiniated question but I can give you some of the possibilities:

- Nationalism ( many countries have this trait). Usually the more you have the more of a world power you can become.

- To make a statement. To gain attention for the cause they believe in and to persuade or influence the rest of the world.

- During World War 2 the USA had officially become a world power and this is because they fought back and proved they could defend the weak who were also being attacked.

Please vote my answer brainliest. thanks!

Are there any answer choices?

Photographs of soviet missiles from 1950