What event fulfilled our expansion in what was considered America's
Manifest Destiny?

This era, from the end of the War of 1812 to the beginning of the American Civil War, has been called the "age of manifest destiny". During this time, the United States expanded to the Pacific Ocean—"from sea to shining sea"—largely defining the borders of the contiguous United States as they are today.

Yeah i’ll call ya later i don’t have any money to go out there