73 Easting and the 100-Hour War: The Left Hook That Destroyed the Republican Guard

For 45 years, the United States Army trained to fight one war. The big one. Soviet armor pouring through the Fulda Gap into West Germany. Thousands of tanks, mechanized infantry, and artillery pieces crashing against NATO's defensive line in the opening hours of World War III. Every tank crew, every Bradley gunner, every artillery battery in the U.S. Army in Europe trained for that fight. They ran it at Grafenwoehr. They war-gamed it at the National Training Center at Fort Irwin. They rehearsed it until the tactical drills were muscle memory. The Fulda Gap war never came. But on February 26, 1991, in a featureless stretch of Iraqi desert marked only by a GPS coordinate called the 73 Easting, the weapon the Army had built to stop the Soviets found its war. VII Corps. Four heavy divisions and an armored cavalry regiment. Executed the largest armored maneuver since World War II. The 2nd Armored Cavalry Regiment hit the Iraqi Republican Guard's Tawakalna Division in a sandstorm. Eagle Troop destroyed the enemy force in 23 minutes. Hours later, the 1st Armored Division shattered the Medina Division at Medina Ridge in the largest tank battle since Kursk. Not a single M1 Abrams was destroyed by enemy fire during the entire ground war. The machine that trained for the Fulda Gap had found its fight. And it was not close.

The Left Hook

General Norman Schwarzkopf's ground war plan was simple in concept and staggering in scale. While the Marines breached the Saddam Line in central Kuwait and fixed the Iraqi army's attention on the border, VII Corps and XVIII Airborne Corps would swing wide to the west through the open desert of southern Iraq. A massive left hook. The largest armored flanking maneuver since Patton's Third Army broke out of Normandy.

VII Corps was the hammer. Commanded by Lieutenant General Frederick Franks, it was the heaviest armored formation the U.S. Army had fielded since World War II. The 1st Armored Division (Old Ironsides). The 3rd Armored Division (Spearhead). The 1st Infantry Division (The Big Red One), mechanized. The British 1st Armoured Division. And screening ahead of them all, the 2nd Armored Cavalry Regiment. The 2nd ACR's mission was the cavalry mission. Find the enemy. Fix them. Report their positions. And hold them until the heavy divisions rolled up to deliver the killing blow.

To the south, XVIII Airborne Corps provided the outer arc of the envelopment. The 24th Infantry Division (Mechanized), the 82nd Airborne Division, the 101st Airborne Division (Air Assault), and the French 6th Light Armored Division drove deep into Iraq to cut off the Republican Guard's escape routes and seize key road junctions. The 101st executed the largest helicopter assault in history, leapfrogging 150 miles into the Euphrates River valley.

The target of the entire operation was not the Iraqi conscript divisions dug in along the Kuwaiti border. Those would be dealt with by the Marines and the Arab coalition forces. VII Corps was aimed at something bigger. Saddam's Republican Guard. Five elite heavy divisions. The Tawakalna Mechanized Division. The Medina Armored Division. The Hammurabi Armored Division. The Adnan Infantry Division. The Nebuchadnezzar Infantry Division. These were Iraq's best. Equipped with T-72 tanks, BMP infantry fighting vehicles, and crews that had fought Iran for eight years. They were the strategic reserve. The force Saddam was counting on to survive the war and keep him in power.

Schwarzkopf intended to destroy them.

Into the Desert: February 24 to 25

On the night of February 23, VII Corps crossed the Saudi border into Iraq. The breach of the Iraqi defensive belt in VII Corps' sector was assigned to the 1st Infantry Division, which punched through the obstacle belt and opened lanes for the armored divisions to pour through. The 2nd Armored Division's forward brigade assisted in the breach. Within hours, the lanes were open and the heavy divisions were rolling east.

The 2nd ACR led the advance. 4,500 soldiers in three ground squadrons of M1A1 Abrams tanks and M3 Bradley cavalry fighting vehicles, plus an attack helicopter squadron of AH-64 Apaches and AH-1 Cobras. Their mission was to screen ahead of the corps, locate the Republican Guard, and fix them in place. For two days, the regiment moved east through the Iraqi desert in sandstorms that reduced visibility to 400 meters. Contact was light. Scattered Iraqi outposts. Reconnaissance elements. Units that surrendered or were destroyed in brief, one-sided engagements.

The 2nd ACR was blinding the Iraqis. By destroying every reconnaissance element they encountered, the regiment ensured that the Republican Guard had no idea where VII Corps was or how fast it was moving. The Iraqi commanders, oriented south to defend against the expected attack through Kuwait, did not realize that four American heavy divisions were bearing down on them from the west until it was too late.

73 Easting: 23 Minutes

On the afternoon of February 26, the sandstorm was still blowing. Visibility was measured in hundreds of meters. The 2nd ACR's three squadrons were advancing east through the featureless desert, navigating by GPS. A technology so new that many crews were using it for the first time. There were no landmarks. No roads. No terrain features. Just sand, wind, and a grid coordinate that would become one of the most famous in military history.

At approximately 1610, Eagle Troop, 2nd Squadron, 2nd ACR, commanded by Captain H.R. McMaster, received fire from an Iraqi dismounted outpost near a cluster of buildings. McMaster's force consisted of nine M1A1 Abrams tanks and twelve M3 Bradleys. Roughly 140 soldiers. The Iraqi outpost was a screening element for the Tawakalna Division's 18th Mechanized Brigade, which had dug in along a ridgeline facing west, waiting for the Americans to crest the high ground and expose their vulnerable upper armor.

The Iraqi plan was sound. In a pre-GPS war, American forces would have been forced to use roads and would have crested the ridge on predictable avenues of approach. But McMaster's tanks had thermal imaging sights that could see through the sandstorm. And they had GPS, which let them navigate the open desert without roads. The Iraqis were expecting Americans to stumble into their kill zone. Instead, McMaster's lead tank crested the ridge and immediately identified dug-in Iraqi T-72s through his thermal sight.

McMaster fired. His first round destroyed an Iraqi tank. His second round destroyed a second. Within seconds, all nine of Eagle Troop's M1A1s were on line and firing. The Bradleys engaged with TOW missiles and 25mm cannon fire. The Iraqi tanks returned fire. Their rounds either missed or bounced off the Abrams' depleted-uranium-reinforced composite armor. The M1A1's 120mm smoothbore gun hit Iraqi T-72s at ranges where the Iraqi return fire was ineffective. The thermal sights allowed American gunners to engage targets that the Iraqis could not even see through the sandstorm.

Twenty-three minutes after first contact, McMaster halted the advance. Eagle Troop had destroyed over 30 Iraqi tanks, roughly 20 armored personnel carriers, and approximately 30 trucks and other vehicles. Not a single American soldier was killed. Not a single American vehicle was destroyed by enemy fire. One M1A1 had driven over a mine and sustained minor damage. That was it.

McMaster had been told to stop at the 73 Easting grid line and wait for the heavy divisions to pass through. He pushed past it. He feared the Iraqis would counterattack if given time to regroup. He was right to push. By the time he stopped, there was nothing left to counterattack with.

Simultaneously, Ghost Troop and Iron Troop of the 2nd ACR were engaged in their own fights along the same grid line. The 1st and 3rd Squadrons destroyed additional elements of the Tawakalna Division and the Iraqi 12th Armored Division to the south. By nightfall, the 2nd ACR and the 1st Infantry Division's leading brigades had destroyed 160 tanks, 180 personnel carriers, 12 artillery pieces, and more than 80 wheeled vehicles along the 73 Easting. The Tawakalna Division's western flank had ceased to exist.

Medina Ridge: The Largest Tank Battle Since Kursk

While the 2nd ACR was destroying the Tawakalna's screening forces, the heavy divisions were closing in for the main event. On February 27, the 1st Armored Division hit the Medina Division of the Republican Guard at a position that would become known as Medina Ridge.

The Medina Division's 2nd Brigade had dug in along a low ridge with T-72 and T-55 tanks in prepared fighting positions. They were waiting. They knew the Americans were coming. This was not a surprise engagement like 73 Easting. The Medina Division intended to fight.

Approximately 348 Abrams tanks and Bradleys of the 1st Armored Division attacked the Medina's positions. The 37th Armor Regiment's Task Force 1/37 alone destroyed 21 T-72s, 14 BMPs, and multiple other vehicles. The 66th Armor and 69th Armor regiments added to the destruction. The Medina's T-72s fired back. At least one round struck an M1A1 turret at close range. It did not penetrate. The depleted uranium armor held. The Abrams' 120mm gun punched through Iraqi T-72 armor at ranges exceeding 3,000 meters. The Iraqis could not effectively engage targets at those distances. The mismatch was total.

The Battle of Medina Ridge lasted several hours. When it was over, the Medina Division's 2nd Brigade had been annihilated. Over 186 Iraqi armored vehicles were destroyed. The 1st Armored Division lost four M1A1s. All to mines or mechanical failure. Not one to enemy fire. Medina Ridge was the largest tank engagement since the Battle of Kursk in 1943. It was also the most one-sided.

The 3rd Armored Division and the Tawakalna

The Spearhead Division hit the Tawakalna from the west and southwest on the night of February 26 to 27 in what became known as the Battle of Phase Line Bullet. The 3rd Armored's brigades attacked through the remains of the positions the 2nd ACR had already savaged and drove into the Tawakalna's depth. Night fighting with thermal sights gave the Americans a decisive advantage. Iraqi crews could not see the Abrams in the dark. The Abrams could see everything.

The 3rd Armored Division destroyed 112 tanks, 82 armored personnel carriers, 94 trucks, and two air defense systems. Over 500 Iraqi soldiers were captured. The Tawakalna Division. Saddam's most powerful formation. 14,000 soldiers, 220 T-72s, 284 infantry fighting vehicles, and 126 artillery pieces at full strength. Was effectively destroyed as a fighting force in less than 24 hours.

The 100-Hour War

By the morning of February 28, when President Bush declared a ceasefire, VII Corps and XVIII Airborne Corps had gutted the Republican Guard. The Tawakalna was destroyed. The Medina was destroyed. The Hammurabi escaped across the Euphrates with remnants. The Adnan and Nebuchadnezzar were shattered. The 24th Infantry Division caught fleeing Iraqi columns on Highway 8 and destroyed them in a running engagement that lasted through the final hours of the war.

Total VII Corps losses during the 100-hour ground war: 36 killed in action and 148 wounded. Iraqi losses in VII Corps' sector: estimated at 10,000 to 20,000 casualties, over 1,300 armored vehicles destroyed, and tens of thousands of prisoners taken. The disparity was not luck. It was the product of 45 years of preparation meeting an enemy that could not match the technology, training, or doctrine the American military had developed to fight on the plains of Central Europe.

Why It Happened This Way

The M1A1 Abrams was designed to kill Soviet T-72s at range. Its 120mm smoothbore gun, its depleted-uranium armor, its thermal imaging fire control system, and its gas turbine engine were all built for a war against the best the Soviet Union could field. The Iraqi Republican Guard was equipped with export-model T-72s that were less capable than the Soviet originals. They fired downgraded ammunition. Their armor packages lacked the composite inserts used in Soviet-service T-72s. They were the best tanks Iraq had. They were not the best tanks the M1A1 was designed to fight. The mismatch was not close.

But the equipment alone does not explain what happened. The American crews had trained relentlessly. McMaster's Eagle Troop had spent years at the National Training Center, running force-on-force exercises against a Soviet-style opposing force that fought with Soviet tactics. When McMaster crested that ridge and saw dug-in T-72s, he did not have to think about what to do. He had done it a thousand times at Fort Irwin. The drills were reflexive. The gunnery was automatic. The coordination between tanks and Bradleys was seamless. Desert Storm was the NTC exam, and the Army passed it.

GPS was the equalizer that made the left hook possible. Without GPS, navigating four heavy divisions across hundreds of miles of featureless desert. At night, in sandstorms, with no roads or landmarks. Would have been nearly impossible. GPS let tank commanders know exactly where they were at all times. It let artillery batteries fire accurately without visual references. It let the 2nd ACR advance through a sandstorm and arrive precisely where it needed to be to catch the Republican Guard in the flank.

Thermal imaging was the tactical edge that made the battles one-sided. American gunners could see Iraqi vehicles through sand, smoke, dust, darkness, and rain. Iraqi gunners could not see the Americans until they were already being hit. In every major engagement. 73 Easting, Medina Ridge, Phase Line Bullet. The American crews fired first, fired accurately, and killed targets at ranges where the Iraqis could not effectively respond. The thermal sight turned every engagement into a turkey shoot.

The Legacy

The 100-hour ground war proved that the U.S. Army built to fight the Soviets was the most lethal armored force on earth. The doctrine. AirLand Battle. Worked. The equipment. Abrams, Bradley, Apache, MLRS. Worked. The training. NTC, Grafenwoehr, the officer and NCO professional development systems. Worked. Everything the Army had invested in during the Cold War paid off in the Iraqi desert in four days.

Captain McMaster would go on to become Lieutenant General H.R. McMaster. He served as National Security Advisor. He wrote "Dereliction of Duty," one of the most important books on civil-military relations in American history. But before all of that, he was a 28-year-old troop commander who crested a ridge in a sandstorm and destroyed an Iraqi Republican Guard brigade in 23 minutes. The training worked. The equipment worked. And the soldiers of the U.S. Army proved that the force they had built across five decades of Cold War preparation was exactly what it was supposed to be. The best armored fighting force in the world.

Explore the full U.S. Army Gulf War Collection at Tactically Acquired.