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D-Day and the Battle of Normandy: Your Questions
Answered
Written by the D-Day Museum, Portsmouth
What does the “D” in
D-Day stand for?
Why was the expression "D-Day" used?
What were Operation Overlord, Operation Neptune and the Battle
of Normandy? When did they take place?
Which Allied nations took part in the fighting?
How many Allied troops were involved in D-Day?
How many Allied and German casualties were there on D-Day,
and in the Battle of Normandy?
How can I find out more about D-Day and the Battle of Normandy
on the web?
What are some good books to read about D-Day and the Battle
of Normandy?

What does the “D” in D-Day stand for?
The “D” does not stand for "Deliverance", "Doom", "Debarkation" or
similar words. In fact, it does not stand for anything. The “D” is
derived from the word "Day". “D-Day” means
the day on which a military operation begins. The term "D-Day" has
been used for many different operations, but it is now generally
only used to refer to the Allied landings in Normandy on 6
June 1944.
Why was the expression "D-Day" used?
When a military operation is being planned, its actual date
and time is not always known exactly. The term "D-Day" was
therefore used to mean the date on which operations would begin,
whenever that was to be. The day before D-Day was known as "D-1",
while the day after D-Day was "D+1", and so on. This
meant that if the projected date of an operation changed, all
the dates in the plan did not also need to be changed. This
actually happened in the case of the Normandy Landings. D-Day
in Normandy was originally intended to be on 5 June 1944, but
at the last minute bad weather delayed it until the following
day. The armed forces also used the expression "H-Hour" for
the time during the day at which operations were to begin.
What were Operation Overlord, Operation Neptune and the Battle
of Normandy? When did they take place?
The armed forces use codenames to refer to the planning and
execution of specific military operations. Operation Overlord
was the codename for the Allied invasion of north-west Europe.
The assault phase of Operation Overlord was known as Operation
Neptune. This operation involved landing the troops on the
beaches, and all other associated supporting operations required
to establish a beachhead in France. Operation Neptune began
on D-Day (6 June 1944) and ended on 30 June 1944. By this time,
the Allies had established a firm foothold in Normandy. Operation
Overlord also began on D-Day, and continued until Allied forces
crossed the River Seine on 19 August 1944. The Battle of Normandy
is the name given to the fighting in Normandy between D-Day
and the end of August 1944.
Which Allied nations took part in the fighting?
The majority of troops who landed on the D-Day beaches were
from Great Britain, Canada and the US. However, troops from
many other countries participated in D-Day and the Battle of
Normandy, in all the different armed services: Australia, Belgium,
Czechoslovakia, France, Greece, the Netherlands, New Zealand,
Norway and Poland.
How many Allied troops were involved in D-Day?
On D-Day, the Allies landed around 156,000 troops in Normandy.
The American forces landed numbered 73,000: 23,250 on Utah
Beach, 34,250 on Omaha Beach, and 15,500 airborne troops. In
the British and Canadian sector, 83,115 troops were landed
(61,715 of them British): 24,970 on Gold Beach, 21,400 on Juno
Beach, 28,845 on Sword Beach, and 7900 airborne troops.
11,590 aircraft were available to support the landings. On
D-Day, Allied aircraft flew 14,674 sorties, and 127 were lost.
In the airborne landings on both flanks of the beaches, 2395
aircraft and 867 gliders of the RAF and USAAF were used on
D-Day.
Operation Neptune involved huge naval forces, including 6939
vessels: 1213 naval combat ships, 4126 landing ships and landing
craft, 736 ancillary craft and 864 merchant vessels. Some 195,700
personnel were assigned to Operation Neptune: 52,889 US, 112,824
British, and 4988 from other Allied countries.
By the end of 11 June (D + 5), 326,547 troops, 54,186 vehicles
and 104,428 tons of supplies had been landed on the beaches.
As well as the troops who landed in Normandy on D-Day, and
those in supporting roles at sea and in the air, millions more
men and women in the Allied countries were involved in the
preparations for D-Day. They played thousands of different
roles, both in the armed forces and as civilians.
How many Allied and German casualties were there on D-Day,
and in the Battle of Normandy?
“Casualties” refers to all losses suffered by
the armed forces: killed, wounded, missing in action (meaning
that their bodies were not found) and prisoners of war. There
is no "official" casualty figure for D-Day. Under
the circumstances, accurate record keeping was very difficult.
For example, some troops who were listed as missing may actually
have landed in the wrong place, and have rejoined their parent
unit only later.
In April and May 1944, the Allied air forces lost nearly 12,000
men and over 2,000 aircraft in operations which paved the way
for D-Day.
Total Allied casualties on D-Day are estimated at 10,000,
including 2500 dead. British casualties on D-Day have been
estimated at approximately 2700. The Canadians lost 946 casualties.
The US forces lost 6603 men. Note that the casualty figures
for smaller units do not always add up to equal these overall
figures exactly, however (this simply reflects the problems
of obtaining accurate casualty statistics).
Casualties on the British beaches were roughly 1000 on Gold
Beach and the same number on Sword Beach. The remainder of
the British losses were amongst the airborne troops: some 600
were killed or wounded, and 600 more were missing; 100 glider
pilots also became casualties. The losses of 3rd Canadian Division
at Juno Beach have been given as 340 killed, 574 wounded and
47 taken prisoner.
The breakdown of US casualties was 1465 dead, 3184 wounded,
1928 missing and 26 captured. Of the total US figure, 2499
casualties were from the US airborne troops (238 of them being
deaths). The casualties at Utah Beach were relatively light:
197, including 60 missing. However, the US 1st and 29th Divisions
together suffered around 2000 casualties at Omaha Beach.
The total German casualties on D-Day are not known, but are
estimated as being between 4000 and 9000 men.
Naval losses for June 1944 included 24 warships and 35 merchantmen
or auxiliaries sunk, and a further 120 vessels damaged.
Over 425,000 Allied and German troops were killed, wounded
or went missing during the Battle of Normandy. This figure
includes over 209,000 Allied casualties, with nearly 37,000
dead amongst the ground forces and a further 16,714 deaths
amongst the Allied air forces. Of the Allied casualties, 83,045
were from 21st Army Group (British, Canadian and Polish ground
forces), 125,847 from the US ground forces. The losses of the
German forces during the Battle of Normandy can only be estimated.
Roughly 200,000 German troops were killed or wounded. The Allies
also captured 200,000 prisoners of war (not included in the
425,000 total, above). During the fighting around the Falaise
Pocket (August 1944) alone, the Germans suffered losses of
around 90,000, including prisoners.
Today, twenty-seven war cemeteries hold the remains of over
110,000 dead from both sides: 77,866 German, 9386 American,
17,769 British, 5002 Canadian and 650 Poles.
Between 15,000 and 20,000 French civilians were killed, mainly
as a result of Allied bombing. Thousands more fled their homes
to escape the fighting.
How can I find out more about D-Day and the Battle of Normandy
on the web?
There are many good websites about D-Day and the Battle of
Normandy. Here are some that you may find useful:
For more websites about D-Day and the Battle of Normandy,
see our links page
What are some good books to read about D-Day and the Battle
of Normandy?
Hundreds of books have been written about D-Day, and many
are very detailed. Here are some general books, all of which
are good starting points if you would like to know more about
D-Day and the Battle of Normandy.
- Stephen Ambrose, D-Day June 6, 1944: The Climactic Battle
of World War II
- Carlo d’Este, Decision in Normandy
- Max Hastings, Overlord: D-Day and the Battle for Normandy
- John Keegan, Six Armies in Normandy
- Robin Neillands, The Battle of Normandy, 1944
- Cornelius Ryan, The Longest Day: The D-Day Story
- Warren Tute, D-Day
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