The first one the change from nation to empire through imperialism
July 4, 1777 which is was independence day
(2010) further expands on the direct confrontations of colonialism by stating, “[T]he impacts of colonialism were similar, regardless of the specific colonizer: disease; destruction of indigenous social, political, and economic structures; repression; exploitation; land displacement; and land degradation” (p. 37).
The Second World War earned the United States a place at the grown ups table because they showed the rest of the world they were not to be trifled with. Both with their troops fighting and the fact that they were able to finish making the atomic bomb before an old, well established country like Russia.