The Vinh Moc tunnel complex was built to shelter the people of Son Trung and Son Ha communes in Vinh Linh county of Quang Tri Province and located deep in the Vietnamese Demilitarized Zone. It was constructed in several stages beginning in 1966 and used until 1971. The complex grew to include wells, kitchens, rooms for each family and spaces for healthcare. Around 60 families lived in the tunnels; as many as 17 children were born inside the tunnels as well.

The tunnels were a success and no villagers lost their lives. The only direct hit was from a bomb that failed to explode, the resulting hole was utilized as a ventilation shaft.

Three levels of tunnels were eventually built.