Frank Luke, the Arizona Balloon Buster, and the Seventeen Days That Made the Most Feared American Pilot of the First World War

Frank Luke earned 18 aerial victories in just 17 days during the Meuse-Argonne offensive in the fall of 1918, making him the second-highest scoring American ace of the First World War at the time of his death. He was 21 years old. No American pilot specialized more ruthlessly in the most dangerous mission in the air war - destroying German observation balloons - and no American was feared more by the enemy for it.

Why Observation Balloons Were the Most Valuable Target in the Air War

Before radar and reliable aerial photography, a balloon observer was the most accurate targeting system an army possessed. Suspended roughly 2,000 feet over the front lines in a wicker basket with a telephone and field glasses, an observer could watch artillery shells land, correct fire in real time, locate supply columns, and identify gun emplacements and command posts miles behind the lines.

When one side had balloons up and the other’s were down, the artillery advantage was decisive - not marginal. Troops under observed fire faced a fundamentally different tactical situation than those attacking blind. Both sides understood this completely, and both sides invested heavily in balloon defense.

How Difficult It Was to Destroy a German Drachen Balloon

A German observation balloon was not a passive target. Each one sat inside a layered defensive perimeter: anti-aircraft guns ranging from light pom-poms to heavier pieces capable of reaching altitude, machinegun nests around the mooring point on the ground, and dedicated fighter patrols specifically assigned to intercept balloon attacks.

The balloon itself, filled with hydrogen, presented its own technical challenge. Standard machinegun rounds punched holes in the gas bag and let hydrogen leak out slowly. Destroying the balloon required incendiary ammunition, delivered from close range, with enough sustained hits to ignite the gas. That meant flying through ground fire, fighting off or evading the fighter escort, holding an approach long enough to guarantee incendiary contact, and then pulling off without flying through the burning gas or striking the steel mooring cable.

Experienced aces avoided balloon assignments when they could. The casualty rate among balloon-busting pilots was the highest of any specialized role in the air war.

Who Was Frank Luke

Frank Luke was born in Phoenix, Arizona in 1897, the sixth of nine children of a German immigrant who had built a life in the Salt River Valley. He grew up in mining and ranching country - physically tough, genuinely fearless, and constitutionally resistant to being told what he could not do.

He enlisted when the United States entered the war, moved through pilot training quickly, and arrived in France in the spring of 1918 assigned to the Twenty-Seventh Aero Squadron flying SPAD XIIIs near the Meuse-Argonne sector.

His early weeks in the squadron were rocky. He made claims other pilots couldn’t confirm and was openly vocal about his own ability at exactly the moment squadron culture demanded silence until your record did the talking. He was acquiring a reputation as a braggart - a serious liability in a unit where reliability determined survival.

The Aircraft: SPAD XIII

The SPAD XIII was not a forgiving airplane. Powered by a 220-horsepower Hispano-Suiza engine, it had a top speed of approximately 138 miles per hour at altitude and was armed with two Vickers machineguns synchronized to fire through the propeller arc. It climbed heavy and dived fast, and it punished sloppy control inputs.

In an open cockpit in a French autumn, castor oil fumes from the engine drove directly into the pilot’s face, and the cold stiffened hands inside gloves after an hour of flight. The guns froze in cold air with maddening frequency. Clearing a jam while maneuvering under fire was a skill every pilot either developed quickly or did not develop at all.

The Partnership With Joe Wehner

What changed Luke’s trajectory was finding Joe Wehner, a pilot from Boston, Massachusetts. Where Luke was loud, Wehner was methodical. Where Luke was impulsive, Wehner was steady. They had no obvious reason to become close, but Wehner recognized the genuine flying ability underneath the noise, and Luke trusted him as he trusted no one else in the squadron.

Without official direction or permission, they developed their own tactics together. The arrangement was straightforward and nearly suicidal: Luke would make the attack run on the balloon; Wehner would fly high cover, engaging German fighters to keep them off Luke during the approach. Luke always attacked from the east, out of the setting sun, giving him concealment and forcing German gunners to look into the failing light. He would dive from altitude, build speed across the run, and hold his approach through the ground fire until he had confirmed incendiary hits on the gas bag.

The Seventeen Days: A Combat Record Built in Weeks

September 12, 1918: Luke destroyed his first confirmed German observation balloon.

Two days later, he downed two more balloons in a single afternoon, plus an aircraft. The confirmation reports began moving up the chain of command.

September 16: Luke and Wehner each destroyed a balloon on the same day.

By September 18, Luke had 14 confirmed aerial victories - 14 in less than a week of actual combat flying. That placed him second on the American ace list at that moment, behind only Eddie Rickenbacker.

The Germans were now routing telephone warnings between their balloon companies about a SPAD with specific tail markings. They added guns to every balloon in the sector, increased fighter patrol frequency, and developed intercept procedures designed specifically around an American pilot who attacked at dusk from the east.

None of it worked.

The Loss of Wehner

September 18, 1918. Luke went after a balloon near Boinville. Wehner flew high cover. German fighters came in from altitude, Wehner moved to intercept them - exactly what their arrangement called for - and Joe Wehner did not come back. He was 23 years old.

After that, Luke became something categorically different from what he had been before. He stopped sleeping at the aerodrome. He disappeared for days at a time without explanation. He began showing up at American balloon companies near the front, telling observers to watch a specific enemy balloon at a specific time, then flying out alone. The balloon burned on schedule. He would land at a different aerodrome and return to his own squadron the following morning.

His commanding officer grounded him. Luke ignored the order. He was placed under arrest at the aerodrome. He got out. He took a SPAD not assigned to him, destroyed another balloon confirmed by ground observers he had arranged in advance, and returned to find everyone furious and generating paperwork.

His squadron commander recorded in writing that Luke was the finest pilot in the Twenty-Seventh Aero Squadron and the most impossible officer he had ever commanded. Both statements were accurate.

September 29, 1918: The Final Mission

Luke left a note at the aerodrome before he flew that morning. It said, in effect: watch for burning balloons.

Three German observation balloons were up near Murvaux, north of the Meuse - three times the guns, three times the fighter cover, three times every element that made balloon busting the most lethal assignment in the air war. He flew east into the failing light alone.

The first balloon burned in that rolling orange and black fireball visible for miles across the trenches. He turned toward the second, taking fire from below, tracer rounds reaching up through the dusk, and held his line. The second burned. He turned toward the third, which was already being winched down - ground crew cranking hard - and dove for it before it reached the earth.

Three balloons in approximately ten minutes. American ground observers on the friendly side of the lines filed confirmation reports. The fires were seen and recorded.

The Last Stand at Murvaux

Somewhere during those attacks, Luke’s SPAD took hits. He brought it down in a field near Murvaux - not a controlled landing, more of a controlled crash into the grass - wounded but alive.

German soldiers came across the field toward him.

He drew his pistol and refused to surrender.

He was 21 years old.

The Germans buried him at Murvaux with some respect - an occasional custom extended to a particularly skilled enemy. After the Armistice, American investigators located the grave. The people of the village gave accounts of what had happened. The local priest had said prayers over him and maintained the marker.

Frank Luke was posthumously awarded the Medal of Honor.

Legacy: The Name on the Sign

Eddie Rickenbacker, the American Ace of Aces with 26 confirmed victories, was asked many times over the following decades who he believed was the greatest American pilot of the First World War. His answer never changed: Frank Luke. Rickenbacker called Luke the most daring aviator and greatest fighting pilot of the entire war, and said that if Luke had lived, no record in the theater would have stood against him for long.

Luke Air Force Base in Glendale, Arizona carries his name today. It is one of the largest fighter training installations in the world, currently home to the F-35 program - turning out the next generation of fighter pilots not far from where Frank Luke grew up in the desert.

17 days of combat. 18 aerial victories. The most feared American over the Western Front.

Key Takeaways

Frank Luke destroyed 18 enemy observation balloons and aircraft in 17 days during the fall 1918 Meuse-Argonne offensive, making him the second-highest-scoring American ace of the war at the time of his death.
German observation balloons were defended by layered anti-aircraft guns, machinegun nests, and dedicated fighter patrols - balloon busting carried the highest casualty rate of any specialized aerial role in the war.
Luke’s tactic was to attack from the east at dusk, using the setting sun for concealment, while his partner Joe Wehner flew high cover to intercept German fighters.
After Wehner’s death on September 18, 1918, Luke operated increasingly alone and outside military authority - destroying balloons by pre-arrangement with ground observers, ignoring grounding orders, and eventually flying his final mission without official sanction.
On September 29, 1918, Luke destroyed three balloons near Murvaux, crash-landed while wounded, refused to surrender to approaching German soldiers, and was killed. He was posthumously awarded the Medal of Honor.
Eddie Rickenbacker, America’s leading ace with 26 victories, called Luke the greatest American pilot of the First World War.