<Table> <Tr> <Th_colspan="2"> Sherman's March to the Sea Savannah Campaign </Th> </Tr> <Tr> <Td_colspan="2"> Part of the American Civil War </Td> </Tr> <Tr> <Td_colspan="2"> Union soldiers destroying telegraph poles and railroads, and freeing slaves, who are assisting Union soldiers in making their way to safety . </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> November 15--December 21, 1864 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Georgia </Td> </Tr> <Tr> <Th> Result </Th> <Td> Union victory </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Belligerents </Th> </Tr> <Tr> <Td> United States </Td> <Td> Confederate States </Td> </Tr> <Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> William T. Sherman </Td> <Td> <P> William J. Hardee </P> <Ul> <Li> Joseph Wheeler </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Units involved </Th> </Tr> <Tr> <Td> <Ul> <Li> Army of the Tennessee </Li> <Li> Army of Georgia </Li> </Ul> </Td> <Td> Confederate militia </Td> </Tr> <Tr> <Th_colspan="2"> Strength </Th> </Tr> <Tr> <Td> 59,545--62,204 </Td> <Td> 12,466 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Sherman's March to the Sea Savannah Campaign </Th> </Tr> <Tr> <Td_colspan="2"> Part of the American Civil War </Td> </Tr>

What 2 major southern cities were destroyed during the civil war