What acquisition in 1803 nearly doubled the territorial size of the United States?

Question

Quizplus · Accepted Answer

The Louisiana Purchase in 1803 nearly doubled the territorial size of the United States. It was a land deal between the United States and France, which ceded Louisiana territory to the United States for $15 million. This acquisition gave the United States control of the Mississippi River and opened up vast new territories for westward expansion.

What Acquisition in 1803 Nearly Doubled the Territorial Size of the United