<Tr> <Td> Eicher, Longest Night </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 17,500 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 10,000 </Td> </Tr> <Tr> <Td> Esposito, West Point Atlas </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 17--18,000 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 9--10,000 </Td> </Tr> <Tr> <Td> Fox, Regimental Losses </Td> <Td> 2,725 </Td> <Td> 13,416 </Td> <Td> 2,258 </Td> <Td> 18,399 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Kennedy, Civil War Battlefield Guide </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 18,000 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 9--10,000 </Td> </Tr>

The costliest battle in the history of the united states marine corps was the battle of