<Tr> <Td> Slave </Td> <Td> 1860 </Td> <Td> 400,000 (11%) </Td> <Td> 3,500,000 (89%) </Td> </Tr> <Tr> <Td> 1864 </Td> <Td> negligible </Td> <Td> 1,900,000 </Td> </Tr> <Tr> <Td> Soldiers </Td> <Td> 1860--64 </Td> <Td> 2,100,000 (67%) </Td> <Td> 1,064,000 (33%) </Td> </Tr> <Tr> <Td> Railroad miles </Td> <Td> 1860 </Td> <Td> 21,800 (71%) </Td> <Td> 8,800 (29%) </Td> </Tr>

What was the confederate army fighting for in the civil war