In the jungles of Vietnam, there were men who volunteered for missions so dangerous that their own military couldn’t officially acknowledge they existed. They called themselves L R R P’s, pronounced lurps, long-range reconnaissance patrol. Small teams of four to six men who would disappear into enemy territory for days at a time, hunting for intelligence on the Ho Chi Minh Trail.

These weren’t ordinary soldiers. >> [music] >> Out of 400 volunteers, only 32 were selected. They were the ones who hunted the enemy. But by 1968, something changed. The hunters became the hunted because North Vietnam had built something specifically designed to find these invisible men and kill them.

A unit so effective that even America’s most elite soldiers learned to fear it. This is the story of the only enemy unit that L R R P teams were afraid of. To understand why this enemy unit was so terrifying, you first need to understand who the L R R P’s were. The first official L R R P unit was formed in October 1965, attached to the First Brigade of the 101st Airborne Division.

General William Westmoreland formally authorized their [music] creation on July 8th, 1966. But the most elite reconnaissance operators belonged to a unit so secret that its members had to sign 20-year non-disclosure agreement. It was called MACV MACV MACV MACV Military Assistance Command, Vietnam Studies and Observations Group.

The name was intentionally boring. Studies and Observations sounded like a research department, not what it actually was, the most covert special operations unit in American history. SOG teams typically consisted of three American Green Berets and six to nine indigenous fighters, usually Montagnard tribesmen or South Vietnamese Special Forces.

They would be inserted by helicopter into Laos, Cambodia, or even North Vietnam itself, places American forces weren’t supposed to be. Their missions lasted 3 to 7 days. No resupply. No backup. If they were compromised, extraction helicopters might take hours to arrive, if they could get there at all.

To prepare for this, operators attended the MACV Recon School in Nha Trang, established September 15th, 1966. Out of approximately 5,400 students, only about 3,400 graduated. The final exam wasn’t a written test. It was an actual combat patrol in enemy territory. The soldiers called it you bet your life.

And these men were effective. Over the course of the war, L R R P and SOG teams conducted approximately 23,000 [music] patrols. They accounted for around 10,000 enemy killed. Military analysts estimated their effectiveness at a force multiplier ratio of 400 to 1. These were America’s ghosts, men trained to move silently through triple canopy jungle, to see without being seen, to strike and vanish.

But here’s the thing about [music] ghosts. Eventually, someone figures out how to hunt them. The North Vietnamese weren’t stupid. By 1967, they understood they had a serious problem. American reconnaissance teams were finding their supply caches, calling in air strikes on their troops, and disrupting the Ho Chi Minh Trail.

The trail was everything. Without it, the war in the South was lost. So on March 19th, 1967, Ho Chi Minh himself attended a graduation ceremony at Son Tay. It wasn’t for regular infantry. It was for a new branch of the North Vietnamese military that would be given the same command status as air defense, armor, and artillery.

They were called Dac Cong, sappers. And among them, specialized units were created with a single purpose, find and destroy American reconnaissance teams. The most feared of these was a unit with a simple designation, C75. These soldiers were drawn from the elite 305th Airborne Brigade. They received specialized training, some of it provided by Soviet advisers who taught them tracking, counter-reconnaissance, and ambush techniques.

By the fall of 1968, these dedicated hunter units were deployed across Laos and Cambodia. In the A Shau Valley alone, the NVA positioned nearly a dozen counter-recon companies to reinforce their defenses. But the C75 and units like it weren’t just defending. They were actively hunting. Here’s how they did it.

First, LZ watchers. The NVA placed permanent observers on elevated platforms at every viable helicopter landing zone. They watched the skies constantly. Some landing zones were booby-trapped with 250-lb bombs. Second, expert trackers. These men could follow American teams by smell. The American diet, different from Vietnamese food, produced a distinct odor that skilled trackers could detect.

They would fire signal shots to alert neighboring units. Third, tracking dogs. SOG teams counted this by carrying CS tear gas powder to contaminate their trail. One operator reportedly used a silenced .22 caliber pistol to eliminate a pursuing dog. Fourth, Soviet signals intelligence. Russian advisers monitored SOG radio frequencies and could follow American frequency changes in real time.

Lieutenant Colonel Roy Barr confirmed this after the war. And there was a fifth method that SOG [music] teams didn’t discover until much later, agent penetration. A spy code-named Francois worked inside SOG headquarters in Saigon for years. In 1996, he appeared on Hanoi television receiving North Vietnam’s highest military honor.

US intelligence later confirmed there were enemy agents at the highest command levels of SOG. The Americans weren’t just being hunted in the jungle. They were being hunted from within. The effectiveness of these counter-recon units can be measured in blood. MACV SOG’s casualty rate exceeded [music] 100%.

That’s not a typo. It means that over the course of the war, every single recon operator was wounded at least once. About half were killed. By 1968, every SOG operator had been wounded at least once. It was the highest sustained American loss rate since the Civil War. Let me tell you about some of the specific incidents that showed just how dangerous these counter-recon units had become.

August 23rd, 1968. The FOB 4 massacre. Three NVA sapper companies, approximately 100 men, infiltrated the SOG compound at Marble Mountain near Da Nang. They moved through the defenses undetected. When it was over, 16 to 17 Green Berets were dead. It was the single deadliest day in Special Forces history.

And because SOG was classified, >> [music] >> there would be no memorial, no public acknowledgement, just silent graves and redacted files. New Year’s Day, 1969. Recon team Diamondback. NVA sappers specifically targeted and killed all three Americans on the team. Staff Sergeant James M. Hall, Specialist 4 Wayne L. Hall, and Michael J. McKibben.

But here’s the detail that chilled SOG operators when they heard about it. The sappers deliberately left the indigenous team members alive. It was a message. We can reach you anywhere. We know exactly who you are. October 5th, 1968. Spike team Alabama. A nine-man team walked into an L-shaped ambush set by approximately 50 NVA.

The team leader was killed almost immediately. A young specialist named Lynn Black. Black took command. What happened next became one of the most harrowing rescue operations of the war. An NVA Colonel later claimed his forces suffered 90% casualties from the American air strikes called in to extract the team.

But 17 Americans who weren’t even part of the original team died in rescue attempts. And then there was Mad Dog Shriver. Staff Sergeant Jerry Shriver was a legend even among SOG operators. The NVA had put a $10,000 bounty on his head. On April 24th, 1969, he led a Hatchet Force into Cambodia’s Fishhook region.

When his team was surrounded, someone radioed asking if he needed help. His response became famous. “No, no. I’ve got them right where I want them. Surrounded from the inside.” He was last seen advancing alone on an enemy bunker line. Radio Hanoi later claimed they had Shriver’s ears. He was declared dead in 1974.

Today, Mad Dog Shriver remains one of 50 Green Berets still listed as missing in action from the secret war in Laos and Cambodia. The NVA soldier touched the sole of my size 10R army issue jungle boot. I heard a slight gasp of surprise from him. At that moment, I had a death grip on my CAR-15. I had it on single shot.

A CAR-15 on full automatic sounds much different from the bark of an AK-47 on full automatic. If I had to shoot, it would be single shots. For a millisecond, I wondered if my left foot was far enough to the left so that when I fired it, I wouldn’t shoot myself. Time stood still. My pucker factor was minus zero.

After a few of the longest seconds of my life, the wind stirred, but there was no movement. He remained still. John Stryker Meyer served as a Green Beret team leader with Spike Team Idaho, running missions out of Command and Control North in Da Nang. He described what it was like to be hunted by these counter recon units.

On one mission, his team had gone to ground at night, lying motionless in the jungle darkness. NVA trackers were searching for them, moving through the vegetation just feet away. One soldier got so close that he actually touched Meyer’s boot while searching the undergrowth. Meyer and his team couldn’t move, couldn’t breathe.

They had to remain completely still while the enemy literally felt around in the darkness trying to find them. That soldier eventually moved on. But the terror of that moment, of being hunted by men who knew exactly how to find you, stayed with every SOG operator who experienced it. What Meyer describes wasn’t unusual.

It was the reality of every mission by 1968 and 1969. The NVA’s counter recon system had become so sophisticated that SOG teams expected to be detected on almost every insertion. Meyer wrote about these experiences in his book Across the Fence, published in 2003 after his 20-year secrecy agreement expired.

He arrived at FOB 1 Phu Bai in May 1968. By that point, 5 months into the year, the NVA had already wiped out or inflicted severe casualties on nearly a dozen SOG recon teams. The same month Meyer arrived, recon team Idaho was wiped out in Laos. The two Green Berets from that mission, Glenn Lane and Robert Owen, remain listed as missing in action today.

These weren’t random ambushes. They were systematic extermination by an enemy who had learned exactly how to find America’s most elite soldiers. For decades, the story ended there. Americans knew they had been hunted, but they never met their hunters. That changed in 2018. Green Beret Mike Taylor, who served with Special Forces from 1968 to 1972, organized something that had never happened before.

A face-to-face meeting between surviving SOG operators and surviving members of C75, the NVA’s SOG hunter unit. John Stryker Meyer wrote about this meeting for SOFREP. The men who had tried to kill each other 50 years earlier sat down together. Taylor presented a shadow box of SOG challenge coins to the company commander of C75.

Think about that. For 8 years, these two groups had fought the deadliest close-quarters war imaginable. As SOG teams had a kill ratio of 158 to 1 in 1970, the highest in American military history. But C75 had made them pay for every inch of jungle. According to RAND Corporation analysis, the NVA was forced to divert approximately 40,000 troops, the equivalent of four divisions, to rear security operations specifically because of SOG’s effectiveness.

The 559th Transportation Group, which maintained the Ho Chi Minh Trail with roughly 100,000 personnel, had to dedicate entire security battalions just to hunting American recon teams. Both sides had fought with everything they had. Both sides had buried their dead in unmarked graves. And 50 years later, the survivors sat together and finally understood their enemy.

The lessons learned in those jungles didn’t die with the war. On February 1st, 1969, the LRRP companies were redesignated as the 75th Infantry Regiment, Rangers. Today’s 75th Ranger Regiment traces its lineage directly back to those LRRP teams in Vietnam. The tactics developed by SOG, working in small teams behind enemy lines with indigenous forces, became the template for modern special operations.

The counter recon techniques developed by the NVA are studied at war colleges around the world. Sergeant First Class Robert L. Howard, who served with SOG, was nominated for the Medal of Honor three separate times in 13 months. He was wounded 14 times and received eight Purple Hearts.

He remains the most decorated American soldier of the Vietnam War. Roy Benavidez received 37 wounds in 6 hours while rescuing a 12-man recon team on May 2nd, 1968. He was bayoneted, shot, and clubbed. Medical personnel initially put him in a body bag. He spit in the doctor’s face to prove he was still alive. President Reagan awarded him the Medal of Honor on February 24th, 1981.

These men weren’t afraid of combat. They weren’t afraid of death. But they were afraid of C75 and the NVA’s counter recon system. Because that system was designed [music] specifically to defeat the best soldiers America had ever produced. And for 8 years, it nearly did. The secret war remained classified until the 1990s.

Many of the men who fought it couldn’t tell their own families what they had done. Today, 50 Green Berets from SOG are still listed as missing in action, along with approximately 200 aviators who died supporting their missions. If you want to learn more about the men who fought this secret war, I’ve put together a recommended reading list in the description.

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