Thomas Jefferson was the third president of the United States, serving from 1801 to 1809. Here are some of the key events and accomplishments during his presidency:

• Reduced national debt: Jefferson focused on reducing the national debt by cutting military budgets and minimizing expenditures.

• Embargo Act: He fought to keep the United States out of the Napoleonic wars raging across Europe, opting to enact an unpopular embargo that closed American ports and crippled foreign trade.

• Barbary pirates: Jefferson sent a naval squadron to fight the Barbary pirates, who were harassing American commerce in the Mediterranean.

• Louisiana Purchase: Jefferson was responsible for the Louisiana Purchase, which doubled the size of the United States.

• Enabling Act: Jefferson signed the Enabling Act, establishing procedures under which territories organized under the Ordinance of 1787 could become a state.

• Military organizational structure: Congress passed legislation providing for a military organizational structure during Jeffersons presidency.

• Lewis and Clark Expedition: Jefferson sponsored the Lewis and Clark Expedition, which explored the western territory of the United States.

Before his presidency, Jefferson was also known for writing the Declaration of Independence and serving as the first U.S. Secretary of State. He also wrote a bill establishing religious freedom, which was enacted in 1786.