<Table> <Tr> <Th_colspan="2"> Hồ Chí Minh Trail </Th> </Tr> <Tr> <Td_colspan="2"> Southeastern Laos </Td> </Tr> <Tr> <Td_colspan="2"> Ho Chi Minh Trail, 1967 </Td> </Tr> <Tr> <Th> Type </Th> <Td> Logistical system </Td> </Tr> <Tr> <Th_colspan="2"> Site information </Th> </Tr> <Tr> <Th> Controlled by </Th> <Td> National Liberation Front </Td> </Tr> <Tr> <Th_colspan="2"> Site history </Th> </Tr> <Tr> <Th> Built </Th> <Td> 1959--1975 </Td> </Tr> <Tr> <Th> In use </Th> <Td> 1959--1975 </Td> </Tr> <Tr> <Th> Battles / wars </Th> <Td> Operation Barrel Roll Operation Steel Tiger Operation Tiger Hound Operation Commando Hunt Cambodian Incursion Operation Lam Son 719 Ho Chi Minh Campaign Operation Left Jab Operation Honorable Dragon Operation Diamond Arrow Project Copper Operation Phiboonpol Operation Sayasila Operation Bedrock Operation Thao La Operation Black Lion </Td> </Tr> <Tr> <Th_colspan="2"> Garrison information </Th> </Tr> <Tr> <Th> Past commanders </Th> <Td> Võ Bẩm Phan Trọng Tuệ Đồng Sỹ Nguyên Hoàng Thế Thiện </Td> </Tr> <Tr> <Th> Garrison </Th> <Td> 5,000--60,000 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Hồ Chí Minh Trail </Th> </Tr>

When was the ho chi minh trail used