Broderick–Terry duel
The Broderick–Terry duel (subsequently called "the last notable American duel") was fought between United States Senator David C. Broderick, of California, and ex-Chief Justice David S. Terry, of the Supreme Court of California, on September 13, 1859. The two men had been friends and political allies within the Democratic Party. However, Broderick was an abolitionist, whereas Terry was pro-slavery. Intense political disagreements led to bitter resentments, which in turn led to a challenge to a duel and the fatal encounter in a ravine near Lake Merced in San Francisco.
Not long after the duel, both public opinion and legislation turned strongly against the custom of duelling. The site of the duel is now a registered California Historical Landmark.