Aaron Burr Jr. was an American politician and lawyer. He served as the third vice president of the United States during President Thomas Jefferson's first term from 1801 to 1805. Burr's legacy is defined by his famous personal conflict with Alexander Hamilton that culminated in Burr killing Hamilton in the famous Burr–Hamilton duel in 1804.
Burr was born to a prominent family in New Jersey. After studying theology at Princeton, he began his career as a lawyer before joining the Continental Army as an officer in the American Revolutionary War in 1775. After leaving the service in 1779, Burr practiced law in New York City, where he became a leading politician and helped form the new Jeffersonian Democratic-Republican Party. As a New York Assemblyman in 1785, Burr supported a bill to end slavery, despite having owned slaves himself.
At age 26, Burr married Theodosia Bartow Prevost, who died in 1794 after twelve years of marriage. They had one daughter, Theodosia Burr Alston.