At 2:00 PM on May 4, 1945, a 29-year-old SS officer stood at the window of his modest dwelling in the village of Itter, in the Austrian Tyrol, staring up the steep, tree-covered slope toward the formidable stone walls of a medieval castle. For months, he had been recovering in this quiet mountain village, nursing severe wounds suffered during fierce defensive fighting in France. He still wore the field-grey uniform of the Waffen-SS, bearing the decorations of a veteran who had fought from the frozen trenches of Leningrad to the shattered fortifications of Normandy. But the ideological fire that had once driven him had gone out completely.

Germany was broken. Adolf Hitler had been dead for four days. The Red Army was deep inside Berlin, and the Western Allies were rapidly tightening their grip on the mountain passes into Austria. And yet the war was not over.

In the Brixental Valley below, the roads were clogged with withdrawing elements of the 17th SS Panzergrenadier Division. They were hard, desperate men with no intention of surrendering. They were throwing up roadblocks, dragging flat-trajectory 20mm guns and 88mm anti-tank guns into the treelines, and executing anyone they suspected of desertion. The tactical reality was grim.

The valley was a powder keg, and the castle sat at its very heart. The officer, Kurt-Siegfried Schrader, knew exactly what the medieval fortress contained. Since 1943, the castle had served as a specialized subcamp of the Dachau concentration camp system, housing high-value French political prisoners. Among them were two former prime ministers, Édouard Daladier and Paul Reynaud, the military commanders Maxime Weygand and Maurice Gamelin, and the tennis legend Jean Borotra.

They had been held as potential bargaining chips for the Reich. But with the Reich collapsing, their value as hostages had evaporated, replaced by their danger. Earlier that morning, the brutal SS camp commandant, Sebastian Wimmer, had suddenly fled his post. Alarmed by the suicide of the Dachau commandant and the advance of American lines, Wimmer and his guards had abandoned the castle, leaving the French prisoners locked inside.

The prisoners were now unguarded, but they were far from safe. Roving bands of fanatically loyal Waffen-SS troops were combing the area. It was only a matter of time before a local SS commander realised the castle was vulnerable and ordered the prominent prisoners executed to prevent them from falling into Allied hands. Recognising the gravity of their situation, the French dignitaries managed to send a message down to the village.

In their desperate search for anyone who could provide them armed protection, the message reached Schrader. As a captain in the Waffen-SS, Schrader represented the very organisation that had imprisoned them. If he openly defied the system, his uniform would not protect him; he would be hanged from the nearest lamppost for treason by his own withdrawing comrades. The most logical decision for survival was to stay in his room, avoid drawing attention, and wait for the Americans to arrive.

Instead, he buckled on his leather belt, readied his 9mm MP 40 submachine gun, and walked out the door. Alone, he climbed the towering, 2,185-foot hill to the castle gates. When the massive wooden doors swung open, the French dignitaries were stunned to see a Waffen-SS officer enter alone, offering his protection. Schrader was direct.

He took command of the immediate defence, inspecting the thick medieval walls, the narrow courtyard, and the massive iron gate. The fortification was strong, but he was only one man with a submachine gun. If an SS assault force arrived with heavy armour or artillery, his rank might buy them five minutes of hesitation, but it would not prevent a massacre. He needed men.

He needed heavy weapons. Above all, he needed the Americans. Unbeknownst to Schrader, the French had also sent their Czech cook, Andreas Krobot, on a bicycle through heavily patrolled SS lines in search of help. Sixteen kilometres away in the town of Wörgl, Krobot made contact with Major Josef Gangl, a decorated but disillusioned artillery officer who had also turned against the Nazi cause and was secretly arming the Austrian resistance.

Gangl had only a handful of loyal Wehrmacht soldiers left, far too few to attack an SS position. Recognising the urgency, Gangl climbed into a small vehicle under a white flag and drove straight toward the American lines to surrender, pleading for an armoured rescue force. Back at the castle, the afternoon sun began to sink behind the peaks of the Kitzbühel Alps, casting long, cold shadows across the courtyard. Schrader organised the few weapons the fleeing guards had left behind, distributing Karabiner 98K rifles to the ageing French politicians and generals.

They took up firing positions along the ancient stone battlements. As night fell on Castle Itter on May 4, the valley below reverberated with the roar of SS trucks and the distant crackle of small-arms fire. Schrader stood by the massive castle gate, staring into the dark treeline. He knew the SS would come to storm the castle, but he did not know whether the Americans would reach it first.

Ten miles to the northwest, in the town of Kufstein, Major Josef Gangl’s desperate gamble was beginning to pay off. Under the white flag of truce, the artillery officer, still wearing his uniform, made contact with the spearhead of the American 12th Armored Division. He was brought before 27-year-old Captain John C. “Jack” Lee Jr.

, commander of Company B of the 23rd Tank Battalion. Gangl explained the tactical situation. High-value French prisoners were holed up in a medieval castle, completely surrounded by enemy elements of the 17th SS Panzergrenadier Division, protected by only a handful of men, including a defecting SS officer. Lee did not hesitate.

He radioed his battalion headquarters requesting permission to carry out a rescue mission, which was quickly granted. However, the nature of the terrain and the tactical reality of the collapsing front severely limited what Lee could offer. The route required crossing narrow, crumbling mountain roads, with booby-trapped bridges and dense SS rearguard detachments. Lee assembled a small but fast-moving relief force, one that was also highly vulnerable.

He took his own M4A3E8 Sherman tank, nicknamed “Besotten Jenny,” commanded by Sergeant William O’Connell, plus a second Sherman, a Volkswagen Kübelwagen, and a truck carrying Major Gangl and ten of his loyal German artillerymen. The relief column consisted of 14 American soldiers, 14 German soldiers, and two 30-ton tanks. The column advanced at dusk, the progress slow and methodical. After several miles, at a bridge crossing the River Inn, Lee was forced to leave the second Sherman behind to secure the only withdrawal route, cutting their armoured support in half.

The remaining column pushed deeper into the Brixental Valley. Approaching the village of Itter, they encountered a hastily erected SS roadblock. Lee did not order a halt to negotiate. He ordered the gunner of “Besotten Jenny” to traverse the turret and fire the 76mm main gun directly at the roadblock, destroying it.

The Sherman then rolled over the burning wreckage, clearing the way for the truck behind it. By 10:00 PM, the heavy diesel roar of the Sherman tank echoed between the thick stone walls of Castle Itter. As the tank struggled up the steep approach road and entered the main courtyard, Captain Lee emerged from the commander’s hatch. Inside the dimly lit castle, an unprecedented military command structure took shape.

Captain Jack Lee of the United States Army, Major Josef Gangl of the German Army, and SS officer Kurt-Siegfried Schrader stood around a heavy wooden table assessing their defences. The men had cast aside their ideological divisions, now simply infantry commanders calculating fields of fire, ammunition counts, and lines of sight. Lee took overall command, ordering the Sherman, “Besotten Jenny,” placed directly at the main gate. Its thick frontal armour sealed the only road into the castle, and its 76mm gun was aimed down into the valley.

The American infantrymen were tasked with guarding the main gate. Gangl’s artillerymen and troopers, still in their uniforms, took up interlocking positions along the upper battlements. Lee ordered the French dignitaries to remain deep in the castle’s fortified cellar. The politicians and generals, many of whom had commanded millions of men in the First World War, flatly refused.

They shouldered their borrowed 98K rifles and took their places on the firing line alongside the Americans and Germans. The night passed in tense, cold silence. The defenders numbered no more than forty men. Outside, among the dense trees, hundreds of Waffen-SS troops were quietly moving into position, hauling heavy weapons up the steep slopes.

At 4:00 AM on May 5, the silence broke. It began with the sharp, rapid ripping sound of MG42 machine guns tearing through the eastern wall of the castle. Bullets zipped out of the dark forest, sparking off the old castle stones. Schrader, stationed on the terrace, returned fire with his MP 40, conserving his limited 9mm ammunition with short, disciplined bursts.

The initial probing fire quickly escalated into a coordinated assault. From the treeline above, elements of the 17th SS poured heavy rifle and machine-gun fire into the castle’s windows and embrasures. Lee crouched behind the stone parapets as bullets chipped the rock around him. The SS were moving methodically, using the dense alpine foliage as cover, creeping ever closer to the castle perimeter.

Then came a sound every soldier, Allied and German, knew with dread. The sharp, cracking report of an 88mm anti-tank gun firing from a mountain peak across the valley. The first high-explosive shell slammed into the upper floors of the castle, sending a shower of stone, glass, and shattered timber into the courtyard. The SS had hauled the heavy artillery into a flanking position, aiming its weapons directly at the only heavy weapon the defenders possessed: the Sherman tank parked at the entrance.

The beleaguered “Besotten Jenny” returned fire, its 76mm gun roaring as Sergeant O’Connell tried to suppress the infantry advance on the road. The tank’s . 30 calibre machine gun chattered relentlessly, but the Sherman remained a fixed, massive, unmissable target, trapped in a narrow stone passage. A second 88mm shell screamed across the valley, striking the Sherman’s hull directly.

The armour-piercing round punched through the steel and exploded inside the crew compartment. The interior of Besotten Jenny erupted in violent flame and sharp shrapnel. The tank was immediately disabled, its internal systems destroyed, the crew scrambling out of the burning vehicle, coughing in the thick, oily smoke that began to fill the courtyard. The defenders’ primary tactical advantage was gone.

Captain Lee saw the smoke rising and understood the gravity of the situation. With the Sherman knocked out, the SS infantry sensed an opening. They grew bolder, surging forward, leaving the cover of the treeline, charging toward the castle gate. Lee moved with the cold efficiency of a man who knew exactly how much time he had left, repositioning himself.

He fell back to the inner keep, ordering the remaining American soldiers and German troopers to withdraw to the second floor. The battle devolved into a violent close-quarters engagement. From the upper windows, the mixed unit of Americans, Germans, and French politicians fired a hail of lead. The sound was deafening, the steady crack of the Karabiner 98Ks, the staccato rattle of the MP 40s, and the disturbing thump of SS mortar rounds landing in the courtyard.

Major Josef Gangl, who had played a pivotal role in coordinating the defence, moved between firing positions, issuing orders and directing his men. As he climbed onto an exposed terrace to observe an SS flanking manoeuvre, a sniper’s bullet struck him, killing him instantly. His death was a crippling blow to the morale of his men, but the defence held. Their ammunition was nearly exhausted.

Machine-gun magazines were nearly empty, rifle belts nearly stripped. Lee looked at his watch. It was past noon on May 5. They had been under continuous fire for eight hours.

He knew they had only a few rounds per man left. He made the only decision left: they would hold until the last magazine was empty, then face the coming assault with whatever they had left. Downstairs, the former French prime ministers and generals were no longer passive observers. They were helping distribute the remaining ammunition, pulling the wounded to safer positions, and watching the stairwells with their pistols.

There was no option of surrender. The 17th SS, in a desperate attempt to cover their withdrawal, would leave no witnesses to the surrender of these high-value prisoners. Then the sound of the battle began to change. The regular, rhythmic thumping of the 88mm gun stopped.

The continuous firing from the forest became sporadic, then intermittent. Lee tilted his head, listening over the heavy breathing of his men. He heard a sharp, distinctive sound: an American armoured column making its way through the valley floor. The 142nd Infantry Regiment of the 36th Division had received the distress call radioed by the prisoners earlier that morning.

They had crushed the last German resistance in the valley, advancing with overwhelming force. The SS realised they were now surrounded by an entire American battalion and broke contact. They abandoned their positions in the treeline, leaving behind the bodies of their comrades and their heavy weapons, vanishing into the dense Tyrolean forests. By 4:00 PM, silence hung over the forest.

The Americans reached the castle gate to find a scene of utter devastation. The courtyard was scorched black, the stone walls pockmarked with bullet holes, the battered structure a burned-out shell. They found the survivors, American tankers, German soldiers, and prominent French figures, gathered in the ruins of the keep. The liberation was complete.

Major Josef Gangl was posthumously honoured for his role in the defence, later recognised in Austria as a hero of the resistance. Kurt-Siegfried Schrader was taken into Allied custody, the validity of his decision to abandon his unit and protect the prisoners confirmed by the outcome. While many of his SS contemporaries faced immediate execution or long prison terms for their roles in the regime, the unique circumstances of his actions and his clear detachment from the SS hierarchy made his case a historical anomaly. The Battle of Castle Itter remains the only confrontation of the Second World War in which American and German soldiers fought side by side against a common enemy.

It stands as a stark reminder of the final days of the Third Reich, when the lines between friend and foe, soldier and prisoner, blurred in the overwhelming chaos of collapse. In the stone halls of the Tyrolean castle, the men who fought there proved that even in the final hours of the most destructive conflict in human history, there remained room for individual conscience, defiance, and a choice other than killing.