Answer: During the early 1800s, the United States began to shift its international beliefs away from isolationism and towards expansionism. This was due in part to the Louisiana Purchase in 1803, which doubled the size of the country and opened up new opportunities for westward expansion. Additionally, the War of 1812 helped to solidify American nationalism and increase the country's desire for international recognition and influence.
As the country grew, many Americans began to see the United States as a "city upon a hill" and believed it was their duty to spread democracy and American values throughout the world. This idea was known as Manifest Destiny and played a significant role in the country's westward expansion and territorial acquisitions.
Overall, the early 1800s marked a significant shift in American international beliefs, from a focus on isolationism and neutrality to one of expansionism and a desire for international recognition and influence.
Your welcome. (:
Step-by-step explanation: