<Tr> <Td> </Td> <Td> Constitution adopted </Td> <Td> 14 January 1852 </Td> </Tr> <Tr> <Td> </Td> <Td> Franco - Prussian War </Td> <Td> 19 July 1870 </Td> </Tr> <Tr> <Td> </Td> <Td> Battle of Sedan </Td> <Td> 1 September 1870 </Td> </Tr> <Tr> <Td> </Td> <Td> Republic proclaimed </Td> <Td> 4 September 1870 </Td> </Tr>

Which of these ruled the french second empire