<Tr> <Td> Czechoslovakia </Td> <Td> 1968--1991 </Td> <Td> Czechoslovakia </Td> <Td> <Ul> <Li> Soviet Union </Li> <Li> Bulgaria </Li> <Li> Poland </Li> <Li> East Germany </Li> <Li> Hungary </Li> </Ul> </Td> <Td> Invasion of Czechoslovakia </Td> <Td> Prague Spring </Td> <Td> No </Td> </Tr> <Ul> <Li> Soviet Union </Li> <Li> Bulgaria </Li> <Li> Poland </Li> <Li> East Germany </Li> <Li> Hungary </Li> </Ul> <Tr> <Td> Bangladesh </Td> <Td> 1971 </Td> <Td> Bangladesh (formerly East Pakistan) </Td> <Td> Pakistan </Td> <Td> 1971 Bangladesh genocide </Td> <Td> Bangladesh Liberation War </Td> <Td> No </Td> </Tr> <Tr> <Td> 1971--1972 </Td> <Td> Provisional Government of Bangladesh </Td> <Td> Bangladeshi Resistance </Td> <Td> No </Td> </Tr>

Name all the middle american nations that have been occupied by us troops