Why This American General ‘Blocked’ The Only U.S.Tank That Could Kill A German Tiger

March 6th, 1945.

Cologne, Germany.

A German Panther sits at an intersection near the cathedral, its gun already aimed.

An American tank rounds the corner.

Something new, something heavy.

The German commander stares at a silhouette he has never seen.

It does not look like a Sherman.

He’s certain it must be one of his own.

In the seconds it takes him to understand his mistake, three 90 mm rounds tear through his armor.

This is the story of the M26 Persing, the American tank that could match any German heavy on the battlefield, but was blocked from production for nearly 3 years by one general’s doctrine.

Only 20 reached Europe before the war ended.

They killed Tigers.

They helped capture the last standing bridge across the Rine.

And the general who stopped them never lived to see any of it.

He was dead before the first Persing fired a shot.

The question is why? To understand why the Persing reached the battlefield in February 1945 instead of mid 1944, you have to understand a doctrine that sounds perfectly logical until you count the dead.

In 1941, the United States Army adopted the tank destroyer doctrine.

Its principle was simple.

American tanks were never supposed to fight enemy tanks.

Tanks existed to support infantry and exploit breakthroughs.

Enemy armor would be handled by specialized tank destroyer battalions.

Light, fast vehicles held in reserve and deployed like a fire brigade against armored thrusts.

Lieutenant General Leslie McNair, an artillery man by training and commanding general of Army ground forces, championed this idea with total conviction.

As long as McNair controlled equipment requirements, no American tank needed a gun capable of killing a Tiger because no American tank was supposed to try.

This logic held exactly as long as American tankers faced early Panza 3s and Panzer 4s.

It shattered the moment the Panther appeared.

By mid 1943, Germany was mass-producing the Panther as its standard medium tank.

80 mm of sloped frontal armor, a 75mm high velocity gun that could destroy a Sherman at 2,000 yards.

McNair dismissed the Panther as a rare specialty vehicle.

He was wrong by an order of magnitude.

The Ordinance Department, led by Major General Gladon Barnes, had been developing a 90 mm armed replacement since 1942, the T-26 series.

Barnes pushed for production.

McNair blocked it.

In a letter to General Marshall dated November the 30th, 1943, McNair wrote that there could be no basis for the T-26 except the idea of a tank versus tank duel, which he called unsound and unnecessary.

He insisted the Sherman was the best tank on the battlefield and claimed even the enemy agreed.

Lieutenant General Jacob Divas, head of the armored force, disagreed violently.

He took the extraordinary step of going over McNair’s head directly to Army Chief of Staff George Marshall.

On December 16th, 1943, Marshall overruled McNair and authorized 250 T-26 tanks.

But institutional resistance had consumed critical months.

Production did not begin until November 1944.

The Persing was finally coming.

But McNair would not be there to see it.

And the way he died would haunt the doctrine he built.

The weapon that McNair refused to build was in almost every respect exactly what American tankers needed.

The Persing’s 90 mm M3 gun was adapted from the M1 anti-aircraft gun, the American equivalent of Germany’s famous 88.

Its standard armor-piercing round could penetrate 150 mm of steel at 500 yd, roughly matching the Tiger’s own gun.

But the scarce tungsten core round was devastating.

278 mm at the same distance.

For comparison, the Sherman’s 75 mm gun penetrated just 66 mm.

American tankers had spent 2 years firing at armor they could not pierce.

The Persing ended that equation overnight.

Barnes and his team at the Ordinance Department obsessed over one specific engineering problem, the Sherman’s height.

The M4 stood nearly 9 ft tall, a barn-sized target on any battlefield, because its engine sat in the rear while its transmission and drive shaft ran underneath the fighting compartment to the front sprockets.

Barnes insisted on a rear engine rear transmission layout that eliminated the drive shaft entirely.

The result dropped the Persing’s profile by more than a foot and lowered its center of gravity, making it harder to hit and harder to tip on slopes.

Beneath the hull, the Persing introduced torsion bar suspension to American tank design.

Long steel bars ran transversely inside the hull floor, each one absorbing road shock through controlled twisting rather than the crude vollet springs on the Sherman.

The ride was smoother.

The tracks maintained better ground contact over rough terrain, and the system was mechanically simpler, fewer external components exposed to enemy fire.

This suspension would become standard on every American tank built for the next 40 years.

From the M46 pattern through the M60, the turret carried 102 mm of cast armor on the front.

Compared to the Sherman 64, the Hull Glasses was 102 mm at 46°.

For the first time, an American tank crew could take a hit from a 75 mm Panther round at combat range and survive.

The Persian was not invulnerable, but it was no longer a coffin.

One detail reveals how seriously the ordinance department took the 90 mm gun.

During a training demonstration for Major General Morris Rose, commander of the Third Armored Division, Corporal Clarence Smoyer fired the Persing’s main gun while Rose stood just 50 ft away.

The muzzle blast knocked Rose and his entire entourage off their feet.

Smooyer hit a chimney at 1200 yd, then another at 1500.

Rose brushed himself off and told Eisenhower that American gunnery was now far superior to the Germans.

The gun had a voice and it spoke with authority that no Sherman ever possessed.

The weapon was ready.

The question now was whether 20 tanks could prove what 250 might have settled months earlier.

Of the first 40 T26 E3s off the production line at Fisher Tank Arsenal in Grand Blanc, Michigan, 20 were shipped to Europe and 20 went to Fort Knox for testing.

They arrived at Antworp, Belgium in January 1945.

Major General Barnes himself led the delivery, the Zebra technical mission, bringing civilian technicians to handle problems in the field.

The tanks were split evenly, 10 to the third armored division and 10 to the 9th Armored Division.

Crews trained near Stalberg, east of Arkan.

Each man fired 28 rounds.

Then they went to war.

The Persing’s first fight against a Tiger was a loss.

On February 25th near the Ruru River, a Tiger from Heavy Panzer Battalion 301 hit T26 E3 number 38, nicknamed Fireball, three times at close range, killing two crewmen.

But the Persing absorbed three 88 mm rounds and was repaired and back in action within 9 days.

A Sherman would have burned.

The next afternoon changed everything.

The title’s promise was delivered at Elldorf.

Sergeant Nicholas Mashlonic commanded Persing number 40 with Task Force Love Lady.

He had 12 confirmed kills since Normandy, all in Shermans.

Now he had a weapon that matched his skill.

Mashlonic scouted on foot and found a Tiger dug into a defensive position roughly 1,000 yd away.

He returned to his tank, took the gunner’s position himself, and ordered his driver to inch forward until the gun cleared the ridge line.

The Tiger was moving, exposing its thinner underside.

Mashlonic’s first tungsten round smashed its transmission.

His second drilled through the gun mantlet, ricocheted into the hull, and set it ablaze.

Two more rounds finished the crew.

Minutes later, three Panzer fours retreated along a road.

Mashlonic waited until all three showed their rear armor and picked them off one by one.

His words, just like shooting ducks.

Four kills in a single engagement.

Persing number 40 became the highest scoring tank in the Zebra mission.

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Now, back to the Persing.

The weapon’s most famous moment came 10 days later at Cologne.

Corporal Smoyer, now in Persing Eagle 7, rounded a corner and found himself staring down the barrel of a Panther commanded by an experienced officer who had already destroyed a Sherman minutes before.

The German hesitated.

He had never seen a Persing and thought it was one of his own.

Three rounds in under a minute ended it.

Signal core cameraman Jim Bates captured every shot on 16 mm film.

20 tanks confirmed kills against Tigers, Panthers, and Panzer within days.

But the Persing carried a flaw that its enemies never had to exploit because time ran out first.

The Persing’s honest weakness was its engine.

The Ford GAF produced 500 horsepower, the same power plant that pushed the Sherman, now hauling a vehicle that weighed 26,000 lb more.

Off-road speed dropped to just over 5 mph.

The torquematic transmission groaned under stress it was never designed to bear.

The radiator mounted behind the ammunition lockers against the engine firewall overheated constantly and the weight created a problem no amount of armor could solve.

Bridges.

At 46 tons, the Persing was too heavy for most European spans.

At Remington, where four Persings from the 9inth Armored Division provided critical covering fire as infantry stormed the last intact bridge over the Rine, the tanks themselves could not cross.

They waited 5 days, then fed across on pontoons lashed together in groups of five.

But this limitation was also the proof of what the Persing was built to do.

Every pound that made it too heavy for a bridge was a pound of armor keeping a five-man crew alive.

The Sherman crossed bridges easily and burned easily, too.

The Persing could not go everywhere, but where it went, its crews came back.

In a war measured in burned out hulls, that trade-off was worth every ton.

The war ended before the Persing could fight in numbers.

But the weapon story did not end with the surrender.

5 years after the last shot in Europe, the Persing answered its critics in Korea.

Facing Soviet-made T34 tanks that had overrun American light armor, M26s were pulled off memorial pedestals at Fort Knox and reconditioned for combat.

At the Battle of Abongi in August 1950, four Marine Persings engaged four T-34s.

A tungsten round from one M26 passed completely through a T-34, entering the front glacius and exiting the rear armor.

Three enemy tanks destroyed, zero Persings damaged.

Master Sergeant Ernest Kuma earned the Medal of Honor commanding a Persing at Tagok, holding a river crossing alone for 9 hours.

Korea also confirmed the engine problem.

Overheating transmissions and exhausted power plants forced the Persing’s withdrawal by mid 1951.

But what replaced it was not a new design.

It was the Persing Evolved.

The M46 pattern was a re-engineed M26 with 810 horsepower.

The M47 followed.

Then the M48, the definitive cold war tank.

Then the M60, which served through Desert Storm.

Over 36,000 patent series tanks descended from the Persing’s torsion bar suspension, rear drive layout, and lowprofile turret.

They armed the free world for half a century.

Every one of them carried the Persing mechanical DNA.

Clarence Smoyer waited 74 years for his Bronze Star.

Days after the Cologne duel, he had been caught searching his pockets for bubble gum to give German children.

Fratonization was prohibited.

Military police recorded his name and his medal nomination was pulled.

In September 2019, at the National World War II Memorial in Washington, author Adam Maros arranged a surprise ceremony.

Smoyer was 96.

When he saw the setup, he smiled and said two words, “Bonze star.” The rest of Eagle 7’s crew received theirs postuously.

Smoyer wore the medal not for himself, he said, but for all the young boys who never got to live out their lives.

He died in September 2022 at 99.

He’s buried in Allentown, Pennsylvania.

Today, surviving Persing stand at the Patton Museum at Fort Knox, the American Heritage Museum in Massachusetts, the Royal Museum of Armed Forces in Brussels, and the Tank Museum in Bovington.

One operational example still runs.

A silhouette no one had seen before.

That morning in Cologne, it bought Smoyer 3 seconds and those seconds changed the future of American armor.

The M26 Persing blocked, delayed, declared not battlew worthy.

20 reached Europe.

They were enough.

Do you think the Persing would have changed the outcome in Normandy if it had arrived a year earlier? Or was the real failure the doctrine that tried to make tanks avoid the fight entirely? Drop your answer in the comments and don’t forget to subscribe.