How many states were in Louisiana purchase?
The biggest effect the Louisiana Purchase had on the United States was the change in the size of the country. The Louisiana Territory more than doubled the size of the country. In addition, the Louisiana Purchase forced Spain and France out of the land now defined as the United States, confining their North American territories to Mexico and Canada, respectively.
The addition of new territories through the Louisiana purchase alarmed many southerners, including North Carolinians. As territories acquired by the Louisiana purchase applied for admission to the union, they might apply as free states, states that had banned slavery. Doing so would throw the balance in congress to free states, who might then move to ban slavery throughout the nation.