Napoleon 111 was the ruler of france during all of the following events except?
a. the franco-prussian war
b. the american civil war
c. the unification of italy
d. the haitian revolution

Napoleon III Bonaparte reigned from 1848 to 1870. He entered the Franco-Prussian war and he was captured by Prussians at the Battle of Sedan.
The American civil war in the US fought from 1861 to 1865.
The unification of Italy or Risorgimento took place from 1848 to 1870.
Finally, the Haitian revolution lasted from 1791 until 1804. Napoleon III was the ruler of France after that.

D ) The Haitian revolution.