<Tr> <Td_colspan="2"> Part of the Afghanistan war </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> 14 June 2011--31 December 2016 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Afghanistan </Td> </Tr> <Tr> <Th> Result </Th> <Td> <P> Withdrawal completed in December 2016 and larger U.S. presence </P> <Ul> <Li> U.S. keeps 8,400 troops in 4 garrisons (Kabul, Kandahar, Bagram and Jalalabad) indefinitely due to Taliban resurgence attempt in Kunduz </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Th> Date </Th> <Td> 14 June 2011--31 December 2016 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Afghanistan </Td> </Tr> <Tr> <Th> Result </Th> <Td> <P> Withdrawal completed in December 2016 and larger U.S. presence </P> <Ul> <Li> U.S. keeps 8,400 troops in 4 garrisons (Kabul, Kandahar, Bagram and Jalalabad) indefinitely due to Taliban resurgence attempt in Kunduz </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th> Date </Th> <Td> 14 June 2011--31 December 2016 </Td> </Tr>

What was the highest number of troops in afghanistan