Important Events in Thomas Jefferson's Life By Jadencereeser Apr 13, 1743 Jefferson is born Period: Apr 13, 1743 to Jul 4, 1826 Thomas Jefferson Jun 6, 1776 Jefferson is assigned to draft the Declaration of Independence. Jefferson is assigned to the committee in charge with drafting the Declaration of Independence. Jul 4, 1776 Congress approved the final text of the Declaration. Feb 17, 1801 Jefferson elected President of U.S.A. May 10, 1801 (Anchor Date) Tripoli declares war on the U.S. Feb 1, 1803 (Anchor Date) Europe's Napoleonic wars resume after brief peace. Apr 30, 1803 Louisiana Purchase is approved Thomas Jefferson approves to buy the territory from France for 15 million dollars. May 14, 1804 Lewis and Clark start their expidition Dec 5, 1804 Jefferson is reelected as president. Mar 3, 1809 Jefferson retires and heads back to Montic Feb 1, 1815 Jefferson sales his library of books to the Library of Congress Jul 4, 1826 Jefferson dies