D-Day

World War II landing operation in Europe

War & ConflictPolitics & Government

D-Day — Image via Wikimedia Commons or Wikipedia.

Overview

What happened

Allied forces launched a massive invasion of Normandy, beginning with airborne assaults and amphibious landings on heavily fortified beaches

Date

June 6, 1944

Location

Normandy coast in France, across five sectors: Utah, Omaha, Gold, Juno, and Sword

Key people

General Dwight D. Eisenhower and General Bernard Montgomery led the Allied forces, while Field Marshal Erwin Rommel commanded German defenses

Why it matters

The successful D-Day invasion paved the way for the liberation of Western Europe, marking a significant shift in World War II's balance of power

What was D-Day?

The Normandy landings were the landing operations and associated airborne operations on 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during the Second World War. Codenamed Operation Neptune and often referred to as D-Day (after the military term), it is the largest seaborne invasion in history. The operation began the liberation of France and the rest of Western Europe, and laid the foundations for the Allied victory on the Western Front. Planning for the operation began in 1943. In the months leading up to the invasion, the Allies conducted a substantial military deception, codenamed Operation Bodyguard, to mislead the Germans as to the date and location of the main Allied landings.

Royal Marine Commandos attached to 3rd Infantry Division move inland from Sword Beach, 6 June 1944. An armoured bridgelayer tank is in the background.

Background and consequences

The weather on the day selected for D-Day was not ideal, and the operation had to be delayed 24 hours; a further postponement would have meant a delay of at least two weeks, as the planners had requirements for the phase of the moon, the tides, and time of day, that meant only a few days each month were deemed suitable. German leader Adolf Hitler placed Field Marshal Erwin Rommel in command of German forces and developing fortifications along the Atlantic Wall in anticipation of an invasion. US president Franklin D. Roosevelt placed Major General Dwight D. Eisenhower in command of Allied forces.

Carrying their equipment, US assault troops move onto Utah Beach. Landing craft can be seen in the background.

Why it matters

The invasion began shortly after midnight on the morning of 6 June with extensive aerial and naval bombardment as well as an airborne assault—the landing of 24,000 American, British, and Canadian airborne troops. The early morning aerial assault was soon followed by Allied amphibious landings on the coast of France c. 06:30. The target 80-kilometre (50 mi) stretch of the Normandy coast was divided into five sectors: Utah, Omaha, Gold, Juno, and Sword. Strong winds blew the landing craft east of their intended positions, particularly at Utah and Omaha. The men landed under heavy fire from gun emplacements overlooking the beaches, and the shore was mined and covered with obstacles such as wooden stakes, metal tripods, and barbed wire, making the work of the beach-clearing teams difficult and dangerous.

Related on thisDay

Allied Invasion of Normandy Begins — June 6, 1944

Over 4,000 Allied troops died on Normandy's beaches in France on June 6, 1944, as General Eisenhower's forces turned the tide of World War II in Europe…

Sources and further reading

Use the dated article for the day-specific account; use these references to check the event record and explore its wider historical context.

Date article: Allied Invasion of Normandy Begins — June 6, 1944 Wikipedia source

Cite this page

MLA

“D-Day.” thisDay, thisday.info/history/d-day/. Accessed 19 Oct. 2026.

APA

D-Day. (n.d.). thisDay. Retrieved October 19, 2026, from https://thisday.info/history/d-day/

Chicago

“D-Day.” thisDay. Accessed October 19, 2026. https://thisday.info/history/d-day/.

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