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The Knife: The Myth of the 21-Foot Rule by Mark Hatmaker

 


[This is Part 2 of a several part series on Knives & Knife-Fighting. Part 1 can be viewed here. The series will culminate in the release of our coordinated Plains Knife Course. Currently available Dixie Knife Games & Comanche Knife Ambush. Subscribe to our newsletter, or blog to not miss an article—both free. Subscribers to The Black Box Subscription Service will have discounted access to The Training Program.]

For those not in the know, “The 21-Foot Rule” is a bit of tactical misunderstanding from a few less experienced minds inside the law enforcement cadre and also manifests as a bit of bolstering wishful thinking with certain aspects of the civilian blade-culture contingent.

In short, “The 21-Foot Rule” postulates that a knife-wielding attacker can cover 21’ feet of ground faster than an officer [or CCW citizen] can draw their firearm.

With this formidable information in mind, we were led to assume two things.

One-That officers need to expand their reactionary gap when a blade is present and/or always maintain greater distance in all interaction as no blade visible is not evidence of no blade on the person.

This assumption, even if in error, is not necessarily a bad thing. [It can lead to poor engagement judgment; we’ll get to that.]

Two-The second assumption is the wishful thinking that a knife wielder within 21’ feet is the equal of an opponent with a firearm on the hip.

This has led to many overvaluing the blade itself and/or making assumptions about the utility of their blade training. The danger here is that it allows the blade-focused individual to allow other aspects of training to lapse as they live in some fantasy version of the James Coburn vs. Cowboy-in-a Corral scenario from The Magnificent Seven.

The Origin of the Myth

In 1983, Sergeant Dennis Tueller of the Salt Lake City Police Department conducted several tests to determine at what distance a rushing bladed attacker could cover before an officer could draw their firearm.

The distance ballparked at 21’.

The draw time at 21’ feet was approximately 1.5 seconds.

From Sergeant Tueller’s tests we can reason two things.

1.     We should expand our reactionary gap beyond 21’ feet when facing a blade or the threat of a blade.

2.     We should work on our draw to reduce holster clearance time.

OK, Mark, I hear ya, but, um, where exactly does the myth come in? So far, everything toes the line with obeying the 21’ foot rule.”

Stay with me.

Sergeant Tueller’s Test demonstrated that a speedy blade-wielding attacker could cover that 21’ feet in sub 1.5 seconds.

Notice that…

·        The tests were conducted with athletic recruits.

·        Men and women of an age and disposition to be in Academy.

·        Men and women willing and able to cover distance.

·        Men and women covering this distance in Academy gym conditions, that is,…

·        Clear terrain.

So, in moving towards myth we need to consider two factors at the outset…

What are the athletic attributes of the individual in my 21’ foot reactionary gap?

Does the aggressive 68-year-old grandmother holding a butcher knife require the same greater-than-21’ feet of gap as when facing an 18-year-old high school wrestler from Iowa wielding an Arkansas Toothpick?

Athletic attributes matter.

Life is not merely a game of “Here’s the gear, you’re as good as.”

If that were so, all runners with modern footwear and Camelbak packs, the best gear that 21st century runners can acquire should easily best Roger Bannister’s 1954 breaking of a four-minute mile wearing subpar shoes on a cinder track.

Gear does not necessarily connote ability.

Blade in hand does not suggest or imbue ALL with magical distance covering.

The officer on the scene needs to factor in the “Who” in designating the proper reactionary gap.

The avid bladesman must not assume that training the blade itself imbues one with the ability to cover the 21’ feet like a young recruit in a Salt Lake Police Academy.

Attributes Often Matter MORE Than Gear

Assumptions can overweight training choices.

In conversation with Mick Thorton of the Straight Blast Gym, who was being badgered by many in-the-weeds tactical questions, assurances of “Yeah, I’m a squared away sort, you wouldn’t believe how many seminars I’ve been to.”

Thornton stops one and all in their tracks with, “If all this is so important to you, you are all so squared away, why are you fat?”

Mr. Thornton was not fat-shaming or hoping to lead many a fine soul down the rabbit-hole of body dysmorphia.

He was shaming cognitive error and contradictions of intent.

If one values combat tactics and touts them day-in, day-out should we not see some reflection of this in the canvas of the body that should at least embody a bit of athletic robustness.

The 21’ Foot Rule Does Not Mean That ALL Can Cover That Distance

Distance Does Not Exist in a Vacuum

It matters where that 21’ feet are.

Differences in weapons, terrain, weather, and circumstances have made each battle unique. U.S. military leaders in the Union and Confederate forces, for example, often tried to mimic the methods of Napoleon, but new weapons and different terrain made Gettysburg very different from Austerlitz.”-- Brigadier General Robert Doughty

·        Terrain matters

·        Weather matters

·        Circumstances matter

·        No matter how successful a tactic was at Austerlitz with its open plains, it is not the varied wooded hollows of the Battle of the Wilderness in Virginia.

The Generals who tried to follow “Napoleon’s Maxims of War” meant for the plains of Austerlitz or “rules” devised on the gym floors of the Salt Lake City Police Academy did not and will not survive long in the “wilderness.”

Distance & Barriers

Yes, distance is your ally when facing a blade.

But…so are barriers, so is the terrain.

Gravel slows the sprint.

Parked cars between you and the assailant are better than expanding your reactionary gap to 22’.

21’ Feet & The Hair Trigger

Some have interpreted the “21’ Foot Myth” to mean, “Uh, he has a knife, I reckon the distance to be 15’ feet, I am legally justified to shoot.”

Or…

I have a tactical folder on my hip, inside 21’ feet I am the match for any man with a side-arm.”

Again…

What are the attributes of the blade-wielder?

Psychotic Grandma? Mr. Thorton’s ego-deflated waistline inflated wannabes?

What’s between you and them?

The last time I checked my .357 on this side of a hollow core door trumps your K-Bar on that side of the door.

We must consider the totality of circumstances before we fall back on the lazy thinking of 21’ Foot “Rules.”

Who Else Says There is No 21’ Foot Rule?

Why Sergeant Tueller himself.

His idea behind conducting the test with recruits and supplying us with valuable knowledge is to show us what is possible at the margins from a determined athletic aggressor on clear ground.

He wanted to knock the cocky out of any officer who suffered from “100 Pound Badge and 500 Pound Gun” Syndrome.

He did us all a favor.

Many woke up and gave more respect to the blade and upped tactical awareness.

Unfortunately, some over-corrected and abandoned common-sense and tunneled on the distance and failed to factor in the Who is Wielding and Terrain of Circumstances.

Unfortunately, some trained the knife to greater and greater degrees of baroque filigree in the odd assumption that they were now possessed with something akin to a close-range “Get Out of Hell Free” card.

The Knife is Formidable

Now, none of this [NONE] of this is to say that blades are weak sauce.

None of this says that knife training is useless.

I train the blade, Comanche Plains Trade Knife, to be specific.

What this essay does say, as does Part 1 in this series and the parts to follow is…

Do Not Over Value Blade Tactics At the Expense of Common Sense, Athletic Attributes, and Sensible Evaluations of All Compounding Factors.

The Totality of Circumstances are the bedrock of true tactical and strategic thought.

[This is Part 2 of a several part series on Knives & Knife-Fighting. Part 1 can be viewed here. The series will culminate in the release of our coordinated Plains Knife Course. Currently available Dixie Knife Games & Comanche Knife Ambush. Subscribe to our newsletter, or blog to not miss an article—both free. Subscribers to The Black Box Subscription Service will have discounted access to The Training Program.]

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