Territorial Expansion and Manifest Destiny (1800-1850)

During the 19th century, the United States underwent significant territorial expansion, particularly with the acquisition of new lands through events such as the Louisiana Purchase (1803) and the concept of Manifest Destiny. Analyze the ways in which this territorial expansion reflected both continuities and changes in U.S. policy and attitudes towards westward movement from 1800 to 1850. In your response, provide specific examples to support your analysis.