<Tr> <Td> August 8--November 11 </Td> <Td> Hundred Days Offensive, last offensive on Western Front . </Td> <Td> </Td> </Tr> <Tr> <Td> August 8--12 </Td> <Td> Battle of Amiens, first phase of the Hundred Days Offensive . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 9--12 </Td> <Td> Battle of Montdidier . </Td> <Td> </Td> </Tr> <Tr> <Td> August 13--September 3 </Td> <Td> Battle of San Matteo . </Td> <Td> </Td> </Tr>

When did france declare war on germany ww1