I'm not completely sure if these are the most relevant or important things that occurred in relation to your needs but here:
The Jefferson era is accepted in social as 1800-1828 (or 1830).
Some things that happened include:
- February 17, 1801
Election of 1800, President Jefferson is elected (Federalist Party)
- Year of 1801
Jefferson's presidential theme was to unite the Federalists and Republicans
- April 30, 1803
Louisiana is bought into America
- April 15, 1805
Louis and Clark reach the Pacific (in their exploration)
- July 15, 1806
Zebulon Pike explores the Southwest
- December 22, 1807
Embargo Act is signed (slavery abolished)
- In 1810
Tecumseh was encouraged to follow the Treaty of Greenville
- August 9, 1814
Treaty of Fort Jackson signed
- December 24, 1814
Treaty of Ghent
- June 18, 1812
War of 1812
- January 8, 1815
Battle of New Orleans
- March 3, 1820
Missouri Compromise, allowing that state to join US despite there being slavery still
- December 1, 1824
Presidential vote got turned over to the House by the Congress due to no majority vote
- December 22, 1828
President Andrew Jackson is elected