Jefferson's presidency focused on undoing Federalist policies at home and maintaining American neutrality abroad.
Marbury v. Madison (1803) was a landmark case that laid the foundation for the exercise of judicial review in the United States.
The Louisiana Purchase doubled the size of the United States overnight and marked a major invasion into American Indian territory.
After the purchase of the Louisiana Territory, Thomas Jefferson sent Lewis and Clark to lead an expedition called the "Corps of Discovery."
The Barbary Wars were two wars fought between the United States and the Northwest African Barbary States in the early nineteenth century.
Although Jeffersonians extolled the virtues of the independent yeoman, they also were strongly in favor of slavery.