manifest destiny was the 19th-century doctrine or belief that the expansion of the US throughout the American continents was both justified and inevitable.
If they wanted to expand they would have to aquire land, so they drove the indians off their own land.
go away we want this land
the indians were forced to move. the route they took was later called the trail of tears.
President Thomas Jefferson kicked off the country’s westward expansion in 1803 with the Louisiana Purchase, which at some 828,000 square miles nearly doubled the size of the United States and stretched from the Mississippi River to the Rocky Mountains.
By the time the Oregon question was settled, the United States had entered into all-out war with Mexico, driven by the spirit of Manifest Destiny and territorial expansion.
U.S. expansion also fueled the growing debate over slavery, by raising the pressing question of whether new states being admitted to the Union would allow slavery or not—a conflict that would eventually lead to the civil war
we dont want slaves
we do so lets have a war to see if we have slaves or not.