By 1860 almost half of the American people lived west of the Appalachian Mountains. In the 19th-century movement of settlers into the American West, was initiated with the Louisiana Purchase and Lewis and Clark´s expedition. I was also triggered by the California Gold Rush, the Oregon Trail and "manifest destiny." Manifest destiny was the believe that Americans were meant to expand across all of North America.
Republic
Unitary state
Semi-presidential system
Military dictatorship
Answer:
a treaty is an written agreement between countries.
Explanation:
It is the legislative i believe!
Declaration of independence? sorry if im wrong
