Which one of the 6 territories that were brought under the flag of the United States was the most important to the growth of our country? Explain why you think this. in 3-4 sentences. make it sound like an 8th grader

I think the Louisiana Purchase was the most important territory for the growth of the United States. This is because it doubled the size of our country and helped us to expand westward. It gave us control of the Mississippi River which was important for trade and transportation. It also opened up new opportunities for settlers and helped us become a stronger nation.