Stalking the Vietcong - Inside Operation Phoenix

This is the rare insider account that explains what Phoenix actually was—not the assassination program of legend, but an intelligence-driven effort to dismantle an insurgency's political spine. Herrington writes with a soldier's honesty about what worked, what was corrupted, and what America never understood. Read it if you care about counterinsurgency, interrogation ethics, or how good intentions rot in a war nobody can define.

1. 1Prologue, Chapters 1-2

   The war nobody in Washington could name

   February 1971. A young Military Intelligence lieutenant named Stuart Herrington arrives in Vietnam and takes over the Phoenix Program in Hau Nghia Province, a heavily contested area adjacent to Saigon with heavy VC infiltration routes. His predecessor, Captain Bob Andreatta, warns him: 'Hau Nghia is a tough province. The VC own it at night.' His target isn't soldiers—it's the Vietcong Infrastructure, the political machinery that feeds, taxes, and commands the guerrillas. Call it 'the other war,' distinct from the 'big war' of conventional battles; the 'little war' of intelligence and counterinsurgency was his domain in Phoenix.

   The idea

   Herrington repeatedly distinguishes between the conventional war against main-force units and the political-infrastructure struggle against the VCI. He wrote the book so future soldiers wouldn't repeat the mistake. The VCI were not a shadowy terrorist group but an integral part of the rural population, making them nearly impossible to isolate.

   Try this: Pick a conflict in the news this week and ask: is the coverage about battles, or about who actually governs the ground? Notice which question the reporting skips.

2. 2Chapters 1, 6, Appendices

   A black book full of ghosts

   Herrington's first working tool is a classified 'Blacklist'—a roster of suspected VCI members maintained by the DIOCC, which fused intelligence from military, police, and civilian sources. Each entry lists a name, alias, position, area of operations, and the sources backing the claim. It looks impressive. Then he starts using it. He found it to be outdated and based on stale information.

   The idea

   He found the Blacklist to be outdated and based on stale information.

   Try this: Audit one list you rely on—contacts, tasks, assumptions about a project—and mark what's actually current versus inherited.

3. 3Chapters 3, 4, 8, 9

   Cigarettes beat coercion

   Herrington's interrogation of a captured Vietcong tax collector named Sau (Nguyen Van Sau), a farmer accused of being a tax collector, took place in the district interrogation room. Using his interpreter Tam, he employed a calm, non-threatening approach, offering cigarettes and speaking respectfully. This contrasted with the harsh methods sometimes used by South Vietnamese police. Sau provided detailed information on the VC tax collection apparatus in several hamlets, leading to the capture of documents and further arrests. Herrington's interrogation training at Fort Holabird, Maryland, emphasized psychological methods over physical coercion. He notes the success came from treating the prisoner 'like a human being.'

   The idea

   He found coercion produced unreliable information. He credits his interpreter, Sergeant Nguyen Van Tam, with crucial cultural and linguistic insights that made their interrogations successful.

   Try this: In your next difficult conversation, lead with genuine curiosity about the other person's situation before making your ask. Watch what changes.

4. 4Chapter 5

   Three sources or it doesn't count

   Strict rules of evidence required three separate sources before a person could be officially classified as VCI. The neutralization process required three steps: identification of a suspect as VCI, location of the suspect, and capture or neutralization. The Phoenix program's official Vietnamese name was the Phung Hoang program; it was a joint U.S.-South Vietnamese effort.

   The idea

   The program's goal was to identify and neutralize the VCI through a coordinated U.S.-South Vietnamese intelligence and operations effort, using capture, defection, or killing. He acknowledges abuses occurred elsewhere.

   Try this: Before acting on a strong claim this week, ask whether you have three independent confirmations—or just one loud source repeated three times.

5. 5Chapters 7, 9, 14

   Six hours in the dark at Tan Phu Trung

   Herrington participated in a night ambush with South Vietnamese forces (Regional Forces) near the village of Tan Phu Trung, waiting in silence for six hours along a suspected VC trail. The ambush was sprung on a group of five VC, and in the ensuing firefight two VC were killed and two couriers carrying documents were captured. The capture led to further arrests.

   The idea

   The capture led to further arrests.

   Try this: Choose one slow, unglamorous task you've been avoiding and do it with full patience this week—notice what it unlocks downstream.

6. 6Chapters 4, 5

   The informant called Turtle

   Herrington recruited a low-level VCI defector as a paid informant (code-named 'Turtle'), who provided tips on VC movement and supply caches. A specific operation based on the informant's tip led to the ambush of a VC courier carrying important documents—the courier was killed and the documents were captured. Herrington worked with the Chieu Hoi (Open Arms) program, which offers amnesty to Viet Cong defectors; he processed several defectors, known as 'Hoi Chanh,' who were given a small cash reward, medical care, and, if their information was valuable, could be relocated for their safety. He notes that most defectors are low-level fighters, not political cadres. Herrington discusses the constant need to validate an informant's information and the danger of double agents.

   The idea

   The Chieu Hoi program induced over 200,000 defections during the war.

   Try this: When someone gives you insider information, ask what they gain from telling you. Motivation is the first validity check.

7. 7Chapters 6, 11

   Tet gutted the infrastructure—then it grew back

   The 1968 Tet Offensive decimated much of the VCI in Hau Nghia when cadres exposed themselves by rising up, allowing the government and Phoenix to identify and neutralize large numbers of them. By 1971 the infrastructure had been largely rebuilt, with an estimated 3,000 VCI operatives active in the province.

   The idea

   The VCI were an integral part of the rural population, making them nearly impossible to isolate.

   Try this: When you 'clear' a problem—inbox, backlog, conflict—ask what condition allowed it to grow back, and address that instead.

8. 8Chapters 3, 5, 6

   Grudges on the target list

   Herrington describes Phoenix coordination meetings with South Vietnamese officials where target lists of VCI suspects were reviewed and arrests authorized. He is struck by the arbitrary nature of the lists; corruption and apathy among some officials were major obstacles to the program's effectiveness, and many targets were chosen based on personal grudges rather than intelligence. A conflict arose when an official wanted to arrest a suspect based on thin evidence, illustrating the tension between American emphasis on evidence and Vietnamese desire for swift action.

   The idea

   He is struck by the arbitrary nature of the lists; corruption and apathy among some officials were major obstacles to the program's effectiveness, and many targets were chosen based on personal grudges rather than intelligence.

   Try this: In any evaluation you run this week, check whether the criteria are evidence-based or relationship-based. Name the difference out loud.

9. 9Chapter 12

   The district chief's driver

   Herrington recounts how a district chief's personal driver was identified as a VCI agent who had been passing operational plans to the Vietcong for over a year, discovered through a captured document that named him.

   The idea

   The discovery came through a captured document that named him.

   Try this: Ask who has access to your most sensitive information and when that access was last reviewed. Insider risk beats outsider risk every time.

10. 10Chapter 16

    The courier called Chi Ba

    A female VCI courier known as 'Chi Ba' was captured after a six-week surveillance operation. She was found carrying a detailed map of U.S. firebases in the province and a list of VCI safe houses.

    The idea

    She was found carrying a detailed map of U.S. firebases in the province and a list of VCI safe houses.

    Try this: Pick something you want to understand—a person, a market, a system—and commit to two weeks of observation before acting on it.

11. 11Chapters 9, 12, 20

    The 1972 offensive changes everything

    During the 1972 Easter Offensive, North Vietnamese conventional forces invaded across the DMZ and from Cambodia. His compound was hit by mortar and rocket fire; he helped coordinate air support for besieged outposts, and many VCI suspects on his list were killed in the fighting—'neutralized' but not through the deliberate Phoenix process. He witnessed the siege of An Loc, where approximately 6,000 South Vietnamese defenders held off three North Vietnamese divisions for 66 days, including interrogation of captured NVA soldiers. The conventional threat shifted intelligence priorities away from the VCI.

    The idea

    The conventional threat shifted intelligence priorities away from the VCI. Many VCI suspects on his list were killed in the fighting—'neutralized' but not through the deliberate Phoenix process.

    Try this: Notice when a crisis in your work suddenly reorders all priorities—and what quietly gets abandoned that used to matter.

12. 12Chapters 6, 8, 18

    Assassination program? Not what he saw

    Phoenix's public image in the U.S. was as an assassination program. In his year in Hau Nghia he never witnessed or heard of a targeted killing carried out by Phoenix personnel. The goal was neutralization through capture whenever possible. He acknowledges abuses occurred elsewhere and that the program was often poorly implemented.

    The idea

    He believes the Phoenix Program, as he practiced it, was a legitimate counterinsurgency tool focused on intelligence.

    Try this: Find one topic where your understanding comes entirely from critics or entirely from defenders, and read one account from the other side this week.

13. 13Chapter 22, Epilogue

    The soup with a knife

    As his tour ended in 1972, Herrington briefed his replacement—another young captain—handing over his updated 'black book' and files. Herrington quotes T.E. Lawrence: 'Making war upon rebels is messy and slow, like eating soup with a knife.' After the Paris Peace Accords of January 1973 and the departure of U.S. forces, Herrington returned to Vietnam as part of a U.S. delegation to assess the situation; he found that the VCI remained intact and had re-established their presence in many hamlets. After Herrington's departure, several of his former informants and allies were killed by the VCI; after the war, many of his South Vietnamese counterparts, including some effective police officers, were sent to 're-education camps' by the communist victors. He describes the despair of leaving behind many who had worked with the Phoenix program and faced certain retribution.

    The idea

    Herrington concludes that Phoenix was a fundamentally sound concept that suffered from inconsistent implementation. Intelligence-driven operations against an insurgency's infrastructure are essential but must be conducted with respect for human rights and within the law; its greatest flaw was the inability of the South Vietnamese government to provide due process and rehabilitation for detained VCI. The war was lost not on the battlefield but in the failure to understand the enemy.

    Try this: Write down one lesson from a hard experience you've had and share it with someone facing the same situation now—before they learn it the expensive way.

Anyone interested in how counterinsurgency actually works at the village level—military professionals, intelligence students, and readers of Vietnam War history who want the view from inside the program everyone thinks they already understand. Also essential for anyone thinking seriously about interrogation ethics.

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