Key Facts
- Duration
- 8–26 January 1967 (18 days)
- Total troops involved
- 30,000 US and South Vietnamese
- US units committed
- 2 Army divisions, 1 infantry brigade, 1 paratrooper brigade, 1 armored cavalry regiment
- Target area
- The Iron Triangle, northwest of Saigon
- Civilians displaced
- Entire civilian population of the Iron Triangle forcibly relocated
Strategic Narrative Overview
Launched on 8 January 1967, Cedar Falls deployed 30,000 Allied troops in a sweeping cordon-and-search operation. The Viet Cong largely evaded the force by withdrawing to Cambodia or sheltering in extensive tunnel systems. US forces, using specialized 'tunnel rats,' uncovered and demolished portions of the tunnel network and destroyed large VC supply caches. The civilian population was forcibly evacuated, their villages razed, and the area declared a free-fire zone to deny the VC any support base.
01 / The Origins
By late 1966, the Iron Triangle — a region northwest of Saigon — had become a deeply entrenched Viet Cong stronghold, hosting supply depots, tunnel networks, and command infrastructure. US military planners determined that conventional search-and-destroy tactics had failed to neutralize the area and conceived Operation Cedar Falls as a massive, concentrated effort to permanently eradicate the VC presence there and eliminate a direct threat to the South Vietnamese capital.
03 / The Outcome
The operation concluded on 26 January 1967. Senior US commanders declared it a success, citing destroyed tunnels and captured supplies. However, the Viet Cong returned to the Iron Triangle within weeks of Allied withdrawal, restoring it as a functioning base area. Historians and journalists broadly concluded that Cedar Falls failed its central objective, and that the forced displacement of civilians alienated the local population, undermining broader US pacification goals in South Vietnam.
Belligerents & Mobilization Analysis
Side A
2 belligerents
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.