<Table> <Tr> <Th_colspan="2"> Battle of Fort Henry </Th> </Tr> <Tr> <Td_colspan="2"> Part of the American Civil War </Td> </Tr> <Tr> <Td_colspan="2"> Bombardment and capture of Fort Henry, Tenn, 1860s lithograph by Currier and Ives </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> February 6, 1862 (1862 - 02 - 06) </Td> </Tr> <Tr> <Th> Location </Th> <Td> Stewart County and Henry County, Tennessee, and Calloway County, Kentucky </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 (Union) </Td> <Td> CSA (Confederacy) </Td> </Tr> <Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> Ulysses S. Grant Andrew H. Foote </Td> <Td> Lloyd Tilghman (POW) </Td> </Tr> <Tr> <Th_colspan="2"> Units involved </Th> </Tr> <Tr> <Td> <Ul> <Li> Army of the Tennessee (District of Cairo) </Li> <Li> Western Flotilla </Li> </Ul> </Td> <Td> <Ul> <Li> Army of Central Kentucky </Li> <Li> Fort Henry garrison </Li> <Li> Fort Heiman garrison </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Strength </Th> </Tr> <Tr> <Td> 15,000 7 ships </Td> <Td> 3,000--3,400 </Td> </Tr> <Tr> <Th_colspan="2"> Casualties and losses </Th> </Tr> <Tr> <Td> 40 1 Ironclad Seriously Damaged </Td> <Td> 79 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Battle of Fort Henry </Th> </Tr>

What were the casualties of the battle of fort henry
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