Answer:
Francisco Pizarro
After years of preliminary exploration and military skirmishes, 168 Spanish soldiers under conquistador Francisco Pizarro, his brothers, and their native allies captured the Sapa Inca Atahualpa in the 1532 Battle of Cajamarca.
He was hearing voices inside his head and they were telling him bad things. He thought cutting off his ear would help... I did not.
The assassination of President Garfield triggered the civil service of the 1880s.