<Tr> <Td> </Td> <Td> 1966 </Td> <Td> Bangkok, Thailand </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 1970 </Td> <Td> Bangkok, Thailand </Td> <Td> </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Tehran, Iran </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> 1978 </Td> <Td> Bangkok, Thailand </Td> <Td> </Td> </Tr>

When did india won her first olympic gold medal in field hockey