Exercise Tiger, a Tragic Rehearsal for D-Day

Most of us know something of D-Day. On June 6, 1944, more than 160,000 Allied troops landed along a 50-mile stretch of heavily-fortified French coastline, to fight Nazi Germany on the beaches of Normandy, France. Gen. Dwight D. Eisenhower called the operation a crusade in which, “we will accept nothing less than full victory.” More than 5,000 Ships and 13,000 aircraft supported the D-Day invasion, and by day’s end, the Allies gained a foot-hold in Continental Europe. The cost in lives on D-Day was high. More than 9,000 Allied Soldiers were killed or wounded, but their sacrifice allowed more than 100,000 Soldiers to begin the slow, hard slog across Europe, to defeat Adolf Hitler’s crack troops.(Army.mil)

But what do you know of EXERCISE TIGER? Off Slapton Sands on the coast of Devon, 946 American servicemen perished during what was known a Exercise Tiger, a rehearsal for what would be the D-Day landing on Utah Beach in Normandy, France. This occurred but nine days before the event mentioned above, being organized in April 1944. 

History.com describes Exercise Tiger thusly, “The dry run was designed to simulate the confusion and carnage of combat, but it became all too real after German torpedo boats stumbled upon the landing fleet and sank several of its ships. Despite the loss of some 750 American servicemen, the fiasco was initially covered up to ensure the D-Day mission remained secret. In the early morning hours of April 28, 1944, an Allied fleet slinked toward the coast of southern England. Along with a lone British corvette, the flotilla included eight American tank landing ships, or LSTs, each one of them filled to the brim with soldiers from the U.S. Army’s VII Corps. In just five weeks, these same troops were scheduled to land in France as part of Operation Overlord, the Allies’ secret plan to invade Nazi-held Western Europe. Overlord was integral to the Allied strategy for victory in World World II, and to ensure it went smoothly, military brass had organized a sweeping dress rehearsal codenamed ‘Exercise Tiger.””

Some 3000 residents from Slapton, Strete, Torcross, Blackawton and East Allington in South Devon departed their homes as part of the exercised designed by the American military. Slapton Sands reportedly resembled the Normandy coast line, and, therefore, it was chosen for the military simulation. 


Troops involved in the action of Exercise Tiger ~ Credit: NARA

Historic UK tells us, “The beautiful and usually tranquil River Dart filled up with landing craft and ships for the operation. Nissen huts sprang up in Coronation Park in Dartmouth and new slipways and ramps were built on the river’s edge, all the way from Dartmouth up to Dittisham. Exercise Tiger was designed to be as realistic as possible and on 22nd April 1944 it began. Landing craft loaded with soldiers, tanks and equipment were deployed along the coast. However, unbeknown to the military, under cover of darkness nine German E-boats (fast attack craft) had managed to slip in amongst them in Lyme Bay. Two landing ships were sunk and a third badly damaged. Lack of training on the use of life vests, heavy packs and the cold water contributed to the disaster: many men drowned or died of hypothermia before they could be rescued. Over 700 Americans lost their lives.”

The exercise conducted upon Slapton beach also proved disastrous. It included a live-firing exercise creating what we now call “friendly fire” deaths from the naval bombardment. The losses occurring during this event were kept secret until long after the war had ended. 


Lyme Bay, England ~ Wikimedia Commons


“Later that year on Sunday 4th June, the people of Dartmouth were ordered to stay indoors: tanks rolled through the town and troops converged on the harbour with its landing craft and ships. The following day 485 ships left the harbour, taking a full day to clear the mouth of the river and at dawn on the 6th June, the invasion of France began. Thanks to the training at Slapton, fewer soldiers died during the actual landing on Utah Beach than during Exercise Tiger, and so the training in Devon was not in vain.” (Historic UK)

Slapton was not the only site in Devon to be used by the American military during World War Two. The north coast around Woolacombe Bay was also used for practising amphibious landing assaults in preparation for the D-Day landings.

About Regina Jeffers

Regina Jeffers is the award-winning author of Austenesque, Regency and historical romantic suspense.
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11 Responses to Exercise Tiger, a Tragic Rehearsal for D-Day

      • Nigel Lewis says:

        Dear Regina,

        I enjoyed your blog on Tiger, but you might have a look at my new book recently publsihed by Kindle, “The Cover Plan Conspiracy: The British and Exercise Tiger, 1944”. After 73 years, the real story at last …

        It’s my second book on Tiger in thirty years. My first, called Channel Firing in the UK, Exercise Tiger in the US, was published in the late 1980’s.

        Best wishes,

        Nigel Lewis.

      • Hey, Nigel, would you like to do a guest post on my blog to promote your book?

      • Nigel Lewis says:

        Dear Regina,

        How many words, and when would you want it by?


  1. Gerri Bowen says:

    I’d never heard about this, Regina.

  2. Pingback: A Closer Look at Nigel Lewis’s “The Cover Plan Conspiracy,” a Deception Created by the Allied Forces in WWII | ReginaJeffers's Blog

  3. I had no idea about this, even though my father’s side of the family comes from Devon. Thank you for a fascinating, albeit tragic, read.

  4. Chuck H. says:

    Unless your calendar, and the one they used at the time is different than mine, nine days before June 6th would be May 28 not April 27. I think you skipped a month in your count.

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