Think You Know WWII? 7 D-Day Facts & the History Behind Them

Most people have heard of D-Day, but far fewer know what actually happened on June 6th, 1944, when the Allied Forces launched a massive invasion of Normandy. The operation was called Operation Overlord, also known as D-Day. But we bet there are some D-Day facts that you don’t know.

In this blog, we are going to cover some insane, important, interesting, and not-so-well-known facts about D-Day. If you don’t find at least one fact that you didn’t know before now, then we’d have to call you a bona fide WWII expert!

What Is D-Day?

D-Day was the Allied invasion of Normandy, France, on June 6, 1944, during World War II. About 150,000 troops from the United States, the United Kingdom, Canada, and other Allied nations crossed the English Channel and gathered together on five beaches along the Normandy coast: Utah and Omaha (U.S.), Gold and Sword (U.K.), and Juno (Canada).

It marked the beginning of the liberation of Western Europe from Nazi occupation and was widely regarded as one of the most important military efforts in history.

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One of many exciting D-Day facts is the story behind the name. The “D” in D-Day doesn’t actually stand for anything. However, the U.S. military says the “D” was used as a designation to indicate when certain field operations began.

In short, it was initially a placeholder intended to refer to a specific calendar day. The alliteration, however, made the name stick, meaning that the “D” is basically a meaningless designation. In a less official capacity, tons of people have given the letter their own meanings. Here are some of the most common meanings people assign to the “D” in D-Day:

• Doomsday
• Doom
• Departure
• Decision
• Deliverance
• Debarkation

The thing is, D-Day is remembered not for what the letter “D” stands for, but for the courage, sacrifice, and determination of the Allied forces who helped change history.

7 D-Day Facts to Revisit on the 82nd Anniversary

Each detail below offers a closer look at the planning, people, and scale behind the Normandy landings.

1. Over 156,000 Allied Troops Faced Off Against 50,000 German Forces

When it was time for the Allied forces to storm the beach, more than 156,000 people had boots on the ground against an opposing force of nearly 50,000 German troops.

This amphibious assault was also supported by 24,000 Allied paratroopers who dropped behind enemy lines in the dead of night to secure exit roads and bridges. Though this may seem like a massive advantage for the Allies, they faced problem after problem. Rough and choppy seas obliterated 27 of their 38 amphibious tanks.

Bombing runs ended in massive failures. German machine guns cut through American forces. Still, the sheer force of the Allied numbers ensured D-Day was a success.

2. Native Americans Were Among the Allied Forces Who Helped Us Win

Among the 156,000 troops at Normandy were members of the Native American Comanche tribe. These Native Americans served as code talkers, and they were able to get Allied messages across in their native tongue, which the Axis Powers could not decode.

Though not often discussed, we owe much of D-Day’s success to these Comanche code talkers.

3. “BIGOT” Was a Security Clearance Derived from a Trip to Gibraltar

It is often incorrectly stated that the term "BIGOT" was an acronym for “British Invasion of German-Occupied Territory.” In reality, it was a specialized security classification that originated in 1942 during the planning for the Allied invasion of North Africa.

Personnel traveling to the command headquarters in Gibraltar had their travel papers stamped "TO GIB." When planners for the Normandy invasion later needed a security clearance level even higher than Top Secret, they simply reversed the stamp's letters to create "BIGOT."

Those who were cleared to read the highly sensitive invasion plans were officially known as "Bigots."

4. We Almost Celebrated D-Day on June 5th

We all know D-Day is on June 6th, but did you know it was initially scheduled for June 5th? Terrible weather conditions delayed Operation Overlord, giving the attacking forces a better shot at success.

5. America Shipped More Than 6 Million Tons of Supplies to the U.K.

In an effort to aid Allied success in Europe, America sent a large amount of supplies to the U.K., not the least of which was over 450,000 tons of ammunition. The shipment helped Britain prepare for the invasion of Normandy and provided the Allied troops with the resources they needed for combat.

6. The Allies Used Inflatables to Fool German Forces

Leading up to D-Day, the Allies dreamt up a brilliant Troy-like plan. They assembled an army made entirely of inflatable vehicles, including inflatable tanks and trucks, and sent them to the northeast to fool the Germans into thinking the invasion was happening in Pas de Calais, 150 miles away from Normandy.

7. U.S. Troops Weren’t Legally Required to Buy Life Insurance, But They Were Heavily Pressured

A persistent myth about D-Day is that the U.S. government legally required every service member to take out a $10,000 life insurance policy. Under the National Service Life Insurance Act of 1940, $10,000 was actually the maximum allowable coverage a soldier could purchase, not a required minimum.

While participating in the insurance program was technically voluntary, military commanders exerted immense psychological and social pressure on their troops to buy the full $10,000 amount before deploying.

So while buying a policy felt absolutely mandatory to the troops waiting to storm the beaches, there was no legal requirement forcing them to do so.

Why Is D-Day Still Significant?

General Dwight D. Eisenhower was named the commander of the Supreme Headquarters Allied Expeditionary Force. Being the complete military bad*ss that he was, he and his advisors chose Normandy in which to go head-to-head with German forces.

D-Day’s significance isn’t lost on any of us. We said goodbye to many good men and women in the months-long battle, but the victory at Normandy helped the world stifle a tyrannical power and began the process of giving back freedom to those who suffered at the hands of the Fascist Nazi regime.

Why These D-Day Facts Still Matter

D-Day lasted longer than you know. You’ll realize the name is a bit of a misnomer because the battle lasted roughly twelve weeks. More than 1,200 planes, 5,000 amphibious vehicles, and 150,000 troops contributed to a tireless fight for months at the Battle of Normandy site to ensure the Allied victory. And they did that. They got the victory.

While these D-Day facts are incredibly exciting to learn about, they also serve an important purpose: helping us remember the dangers of tyranny and the strength that lies in allies coming together to liberate the world's citizens.

At its heart, D-Day is a story of ordinary people doing extraordinary things in one of the world's darkest moments.