Thomas Jefferson’s presidency (1801-1809) focused significantly on territorial expansion, most notably through the Louisiana Purchase in 1803. Jefferson believed that expanding the United States would promote democracy and provide opportunities for agrarian development. The acquisition of approximately 828,000 square miles from France doubled the size of the nation and opened vast lands for settlement and exploration. Jefferson envisioned a nation of independent farmers, viewing land ownership as essential to civic virtue and thriving democracy. This pivotal moment in American history not only expanded the country but also set the stage for westward migration and eventual statehood for new territories.