WWII used inflatable tanks to fool the Nazis and win the war

The WWII Ghost Army unit used inflatable military equipment, such as the pictured armored vehicle, to fool German forces. They operated from May 1944 through the end of the war in 1945. (Image credit: The National WWII Museum)

Today (Sept. 2) marks the 75th anniversary of Word War II‘s end. During this historic global conflict, hundreds of bloody skirmishes were waged on land, sea and air. But one top-secret U.S. Army battalion fought not with bullets but with stagecraft, using inflatable life-size tanks, phony insignias, soundscapes and fake radio transmissions to deceive German soldiers on the battlefield.

The 23rd Headquarters Special Troops, also known as the “Ghost Army,” brought together artists, career military officers and audio experts in a unique unit devoted to the art of deception — “the first mobile, multimedia, tactical deception unit in U.S. Army history,” according to the National WWII Museum in New Orleans. The museum features a number of Ghost Army artifacts in the special exhibit “Ghost Army: The Combat Con Artists of World War II,” on display until Jan. 3, 2021.

Using a combination of science and art, the Ghost Army staged nearly two dozen missions between May 1944 and 1945 with the sole purpose of tricking Nazi troops about the whereabouts of Allied forces in Europe. In the process, their efforts saved the lives of thousands of Allied soldiers. Its existence was kept secret for more than 40 years after the war’s end; the Ghost Army remained officially classified until the mid-1990s, according to the WWII Museum.

“In the past, when deception operations took place, it was usually a temporary duty,” said Larry Decuers, a curator at the WWII Museum. “This was a ground-up unit designed specifically for deception.”

London-based U.S. Army officers Col. Billy Harris and Maj. Ralph Ingersoll guided the formation of the Ghost Army, inspired by the success of British deception tactics in North Africa, Decuers told Live Science. The British Army’s Operation Bertram, staged in 1942, used camouflage and more than 2,000 dummy vehicles to convince the Germans that the British were strengthening a position in the south, and to conceal British mobilization in the north, according to the website History of War.

A dummy tank, photographed in Italy in 1944 and designed by the British Army. It was made of inflatable rubber and could be assembled in 20 minutes. (Image credit: The National Archives)

Leading the Ghost Army was Col. Harry L. Reeder, supervising 82 army officers and 1,023 recruits; among them were art students from the Industrial Camouflage Program at the Pratt Institute in New York, fashion designer Bill Blass, photographer Art Kane and painter Ellsworth Kelly.

These and other strategists designed a four-part approach to bring phantom army battalions to life, Decuers explained.

“The first element was the camouflage engineer battalion — the guys who dealt with the inflatable vehicles, inflatable tanks,” he said. These tanks could easily be lifted and moved into position by just a few men, but from a distance they were nearly impossible to distinguish from the real thing. The second element was a signal company that concocted fake radio traffic; the radio operators were so skilled that they could mimic the morse code “fist” — the sending style — of operators in specific army units, to make fake dispatches sound authentic.

“To the trained ear, that telegraphic fist is almost like a fingerprint,” Decuers said.

Pictured in 1944, this inflatable tank was part of the WWII Ghost Army efforts to create the illusion of greater Allied forces in Europe from Normandy to the Rhine River.

A third element of the Ghost Army was sonic deception. Audio engineers pre-recorded sounds of military training exercises and the construction of trenches and bridges, and then edited them into soundscapes that could be played on massive speakers within range of German troops, to convince the Nazis that entire combat units occupied locations that were undefended.

And then a fourth layer of deception was supplied by the unit’s combat engineer company, which would don the insignias of other military units to confuse the Germans or to mislead potential spies in nearby towns.

“Their most successful operation was Operation Viersen,” which took place from March 18 to March 24, 1945, Decuers said. For that mission, the Ghost Army used 600 inflatable vehicles; fake uniform patches to impersonate soldiers from other units; and recordings of pontoon bridge-building, “all to deceive the Germans into believing that the 30th Infantry Division and the 79th Infantry Division were preparing to cross the Rhine River,” Decuers said. And it worked. The Germans moved the bulk of their defenses across the river from the suspected location of the two divisions, shelling an army that didn’t exist.

And when the Nazis were busy chasing shadows, they weren’t engaging the real Allied combat divisions.

“It was like a traveling road show that went up and down the front lines impersonating the real fighting outfits,” according to the Ghost Army Legacy Project.

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