 Throughout the operation these units were supposed to bear the brunt of the fighting; South Vietnamese troops were planned to search villages in the region, perform logistical tasks, as well as organizing the deportation of the civilian population.As often during the Vietnam War, the terrain of the area of operations constituted a major problem for military planners.Indeed, the reason why the VC were able to establish the Iron Triangle as a major sanctuary was that its terrain made it difficult for larger military forces to access this region.