<Tr> <Td> September 14 </Td> <Td> Erich von Falkenhayn replaces Helmuth von Moltke the Younger as German Chief of Staff . </Td> <Td> Details </Td> </Tr> <Tr> <Td> September 19--October 11 </Td> <Td> Battle of Flirey </Td> <Td> </Td> </Tr> <Tr> <Td> September 20 </Td> <Td> Battle of Zanzibar, German naval victory . </Td> <Td> </Td> </Tr> <Tr> <Td> September 22 </Td> <Td> Bombardment of Papeete </Td> <Td> </Td> </Tr>

When did germany declare war on russia ww1