Why were Lewis and Clark’s accomplishments so important for shaping the attitudes and expansion of the United States during the 1800s?

 When Thomas Jefferson sent Lewis and Clark into the West, he patterned their mission on the methods of Enlightenment science: to observe, collect, document, and classify. Such strategies were already in place for the epic voyages made by explorers like Cook and Vancouver. Like their contemporaries, Lewis and Clark were more than representatives of European rationalism. They also represented a rising American empire, one built on aggressive territorial expansion and commercial gain.

But there was another view of the West: that of the native inhabitants of the land. Their understandings of landscapes, peoples, and resources formed both a contrast and counterpoint to those of Jefferson's travelers. This part of the exhibition presents five areas where Lewis and Clark's ideas and values are compared with those of native people. Sometimes the similarities are striking; other times the differences stand as a reminder of future conflicts and misunderstandings.

Explanation:

in 32-page handwritten address, washington urged americans to avoid excessive political party spirit and geographical distinctions, in foreign affairs he warned against long-term alliances with other nations. the address was printed in philladelphia's american daily advertiser on september 19, 1796

it the big letter b heart my answer