Which action is the best example of the United States fulfilling its objectives under manifest destiny?

Question

Quizplus · Accepted Answer

The acquisition of land west of the Mississippi with the Louisiana Purchase was a key example of the United States fulfilling its objectives under manifest destiny. This purchase greatly expanded the country's territorial holdings and set the stage for further westward expansion. The other options listed are important events in American history, but they do not directly relate to the concept of manifest destiny.

Which Action Is the Best Example of the United States