Complex sentence: Because of the above incident, Vann called Doublehead "Babykiller" for the remainder of his life; this incident also began a lengthy feud which defined the politics of the early 19th century Cherokee Nation.
Split into simpler sentences: Because of the above incident, Vann called Doublehead "Babykiller" for the remainder of his life. This incident also began a lengthy feud which defined the politics of the early 19th century Cherokee Nation.