The area code-named Sword Beach occupied an 8-km (5-mile) stretch of the French coastline from Lion-sur-Mer on the west to the city of Ouistreham, at the mouth of the Orne River, on the east. The area was dotted with vacation homes and tourist establishments located behind a seawall. It was also approximately 15 km (9 miles) north of the hub city of Caen. All major roads in this sector of the Norman countryside ran through Caen, and it was a key city to both the Allies and the Germans for transportation and maneuver purposes.

The Germans had fortified the area with relatively light defenses consisting of beach obstacles and fortified emplacements in the sand dunes. For the most part, however, the defense of the beach was anchored on 75-mm guns located at the coastal town of Merville, some 8 km (5 miles) to the east across the Orne River estuary, and on bigger 155-mm guns located some 32 km (20 miles) farther east at Le Havre. A few miles inland from the beach were 88-mm guns capable of supporting the machine guns and mortars that were placed in the dunes and villas and that constituted the Germans' first line of defense. There were also antitank ditches and mines as well as huge concrete walls blocking the streets of the towns. Elements of the German 716th Infantry Division—in particular, the 736th and 125th regiments—along with forces of the 21st Panzer Division were in the vicinity and were capable of participating in defensive or offensive operations. To the east, across the Dives River, lay the 711th Division.

Sword Beach lay in the area of landing beaches assigned to the British Second Army, under Lieutenant General Miles Dempsey (Dempsey, Miles Christopher). It was divided by Allied planners into four sectors named (from west to east) Oboe, Peter, Queen, and Roger. Elements of the South Lancashire Regiment were to assault Peter sector on the right, the Suffolk Regiment the centre in Queen sector, and the East Yorkshire Regiment Roger sector on the left. The objective of the 3rd Division was to push across Sword Beach and pass through Ouistreham to capture Caen and the important Carpiquet airfield nearby. Attached commandos, under Simon Fraser, Lord Lovat, had the mission of fighting their way off the beach and pushing some 5 km (3 miles) inland toward the Orne River and Caen Canal bridges, where they were to link up with the airborne forces.

The invading forces landed at 0725 hours on D-Day and were greeted with moderate fire. They were able to put out suppressing fire, and by 0800 hours the fighting was mostly inland. By 1300 the commandos had achieved their most important objective: they had linked up with airborne troops at the bridges over the Orne waterways. On the right flank the British had been unable to link up with Canadian forces from Juno Beach, and at 1600 hours tank forces and mechanized infantry units from the 21st Panzer Division launched the only serious German counterattack of D-Day. The 192nd Panzer Grenadier Regiment actually reached the beach at 2000 hours, but the division's 98 panzers (panzer) were halted by antitank weapons, air strikes, and Allied tanks themselves. The counterattack was stopped.

At the end of the day, the British had landed 29,000 men and had taken 630 casualties. German casualties were much higher; many Germans had been taken prisoner. However, for the Allies the optimistic objectives of Caen and the Carpiquet aerodrome were still a long 5 km away.

Paratroopers from the British 6th Airborne Division, Major General Richard Gale (Gale, Richard Nelson) commanding, were to be landed at night onto the left flank of the Normandy Invasion area in order to help isolate the battlefield for the seaborne invasion force that was scheduled to land on nearby Sword Beach at dawn. The drop zones were labeled X, Y, N, K, and V. X and Y were glider landing zones near the two bridges over the Orne River and the Caen Canal. V was a glider landing zone near the Merville battery, and N and K were on the Ranville ridge separating the Orne and Dives rivers.

The objectives of the 6th Airborne were to seize, intact, the critical bridges over the Orne River and Caen Canal near the village of Bénouville, securing vital exit routes for the forces scheduled to land at Sword Beach; to destroy the bridges over the Dives River, thus denying the Germans a route to the invasion area from the east; to hold the dividing ridge between the Dives and the Orne from an expected German counterattack; and, finally, to destroy the Merville battery, which threatened Sword Beach with its big guns.

At 0016 hours on D-Day, gliders containing Company D, 2nd Oxfordshire and Buckinghamshire Light Infantry, commanded by Major John Howard, touched down precisely on target at the bridges. Within 10 minutes and with the loss of only two men dead, the daring coup de main placed both bridges in Allied hands. Howard's company thus became the first attackers of the Normandy Invasion on French soil and the first unit to achieve its objective on D-Day. The Caen Canal bridge was soon immortalized as Pegasus Bridge, named after the insignia of the 6th Airborne Division.

The rest of the 6th Airborne troopers continued to land throughout the night, although many were scattered. Nevertheless, small parties found one another and managed to destroy five bridges over the Dives.

By morning, as the invasion force rolled ashore on Sword Beach, the left flank of the area was indeed secure. By 1300 hours Howard's glider troops at the bridges had connected with elements of Lord Lovat's 1st Commando Brigade. As evening fell on June 6, the 6th Airborne was generally in place and had achieved its objectives.