<Tr> <Td> First Battle of Fort Fisher </Td> <Td> December 7--27, 1864 </Td> <Td> North Carolina </Td> <Td> </Td> <Td> Confederate victory: Failed Union attempt to take fort . </Td> </Tr> <Tr> <Td> Second Battle of Fort McAllister </Td> <Td> December 13, 1864 </Td> <Td> Georgia </Td> <Td> </Td> <Td> Union victory: </Td> </Tr> <Tr> <Td> Battle of Nashville </Td> <Td> December 15--16, 1864 </Td> <Td> Tennessee </Td> <Td> </Td> <Td> Union victory: Thomas attacks and virtually destroys Hood's Confederate Army of Tennessee . </Td> </Tr> <Tr> <Td> Battle of Marion </Td> <Td> December 17--18, 1864 </Td> <Td> Virginia </Td> <Td> </Td> <Td> Union victory: </Td> </Tr>

What was the longest battle in the civil war