This question mostly speaks for itself, but I'm going to limit the scope to focus on America/ the United States in the 17^th - 19^th century.
What would happen if a person did not follow the rules of a duel?
Hiya, I am sure he will come in and tell you some more about it, but safe to say, /u/Georgy_K_Zhukov has already written a whole bunch on dueling and here he addressses your question quite directly. Hope that helps in the meantime!