Cobra King: The Tank That Broke the Siege

The frozen ground of Belgium trembled under the weight of thirty-seven Sherman tanks as Combat Command Reserve pushed north toward Bastogne on December 26, 1944. At the tip of this armored spear rolled Cobra King, a massive M4A3E2 "Jumbo" Sherman with six inches of frontal armor—twice the thickness of a standard Sherman. Behind its reinforced steel hull sat First Lieutenant Charles Boggess, knowing that the fate of ten thousand surrounded paratroopers depended on what happened in the next few hours.

Eight miles behind enemy lines, the 101st Airborne Division had been cut off since December 20th. General Anthony McAuliffe's legendary "NUTS!" response to German surrender demands had become the stuff of legend, but legends wouldn't stop German artillery or fill empty ammunition boxes. Time was running out.

Lieutenant Colonel Creighton Abrams, commanding the relief column from his own Sherman tank Thunderbolt VI, had personally briefed his tank commanders that morning. "Gentlemen, we're going through everything the Germans put in front of us. No stopping, no backing down. Those paratroopers are counting on us."

The column had already fought through three miles of German defenses since dawn, trading shots with Panzergrenadiers dug into frozen foxholes and knocking out two stubborn anti-tank guns. Now, as they approached the village of Assenois—the last barrier before Bastogne—the resistance stiffened.

Boggess peered through his periscope as Cobra King crested a low ridge. The village ahead looked deceptively quiet, its snow-covered roofs gleaming in the pale December sun. But he knew better. German defenders would be waiting in those buildings, probably with panzerfausts and maybe something heavier.

Contact front!" his gunner, Sergeant Harold Hafner, called out. A German Jagdpanzer IV tank destroyer had emerged from behind a barn, its long 75mm gun swinging toward the American column.

Before Boggess could give the order to fire, the distinctive crack of a tank gun echoed from behind him. Thunderbolt VI had engaged the enemy vehicle at nearly a thousand yards. Captain Jimmy Leach, watching from his own tank, later recalled: "Abrams's gunner put one right through that Jerry's front plate. Blew it to pieces with a single shot. Right there I recommended the Colonel for the Distinguished Service Cross. Here's a full colonel, and a lot of colonels stay back at the goddamn flagpole, but not Abrams. He was right up front with the rest of us."

With the tank destroyer eliminated, Cobra King led the charge into Assenois. German infantry opened up from windows and doorways with rifle fire and panzerfausts. The distinctive whoosh-crack of the German anti-tank rockets filled the air, but most bounced harmlessly off the Jumbo's thick armor—exactly why Boggess had requested the heavily armored variant for this mission.

Keep moving!" Boggess ordered his driver over the intercom. "Don't give them a stationary target!"

The Sherman's 75mm gun barked repeatedly as Hafner engaged German positions. The tank's .30-caliber bow machine gun chattered continuously, forcing German defenders to keep their heads down. Behind Cobra King, the rest of Combat Command Reserve poured into the village, infantry riding on the tank decks firing their rifles into German positions.

The fight through Assenois lasted barely twenty minutes, but it felt like hours. House-to-house combat with tanks was always ugly—too much could go wrong in the confined spaces between buildings. But Abrams had trained his men well, and they knew their business.

As Cobra King emerged from the far side of the village, Boggess could see open ground ahead—and beyond that, the wooded ridgeline that marked the Bastogne perimeter. His heart pounded as he realized they were almost there. Eight days of siege were about to end.

The Sherman climbed the final ridge, its tracks struggling for purchase on the icy slope. At the crest, Boggess saw what he'd been praying to see for hours: foxholes. American foxholes.

But the paratroopers in those holes saw only another Sherman tank approaching—and they'd been shooting at German armor for over a week. Several rifle muzzles swung toward Cobra King.

Don't shoot!" Boggess shouted, standing up in his commander's hatch and waving his arms frantically. "Come here! Come on out! This is the 4th Armored!"

For a moment, nothing happened. The paratroopers stared at the massive tank in disbelief. Then, slowly, figures began emerging from snow-covered foxholes. Gaunt, bearded faces peered up at Boggess—faces that hadn't seen friendly forces in eight days.

One paratrooper, a sergeant with the 101st's distinctive Screaming Eagle patch, approached the tank cautiously. "You guys for real?" he called up.

Real as it gets, soldier," Boggess replied, grinning despite his exhaustion. "The siege is over."

Word spread quickly through the 101st's lines. The relief had arrived. The 37th Tank Battalion had earned its nickname that day: "First to Bastogne." Behind Cobra King, the rest of Combat Command Reserve poured through the gap, bringing ammunition, medical supplies, and reinforcements.

The relief of Bastogne became one of the most celebrated actions of World War II. Creighton Abrams received the Distinguished Service Cross and went on to command all U.S. forces in Vietnam before becoming Army Chief of Staff. General George Patton later said of him: "I am supposed to be the best tank commander in the Army, but I have one peer—Abe Abrams. He is the world champion."

Four decades later, America's main battle tank would bear Abrams's name—the M1 Abrams that continues to serve today. But on that frozen December morning in 1944, he was just another tank commander doing his job, leading from the front when it mattered most.

Cobra King now rests in the Patton Museum, its thick armor bearing the scars of that desperate fight. But for the paratroopers of the 101st Airborne, it will always be remembered as the tank that broke the siege—the first friendly face they saw after eight days in hell.