Alexander Hamilton played major roles in the creation of the United States. He was an aide-de-camp to George Washington during the Revolution, a member of the Continental Congress in 1782, 1783, and 1788 and the Constitutional Convention in 1787, and the first secretary of the treasury. In 1804 Aaron Burr killed Hamilton in a duel arising from ill-will after Federalist leader Hamilton supported Thomas Jefferson instead of Burr in the disputed election of 1801.