Respond to the question in 6-10 complete sentences. Give details or examples to support your answer. Attempt to answer all parts of the question in paragraph form!
(Source 2)
From just Thirteen States to a nation that stretches from sea to shining sea, the United States expanded throughout the 1700s and 1800s to form the nation that we know today.
Using the map (Source 2) below, which three of the 1800's territorial acquisitions do you believe were the most important in the development of the United States? Provide at least two reasons per territory to explain your answers.