Supreme Headquarters Allied Expeditionary Force in the context of "Supreme Allied Commander Europe"

Dwight David "Ike" Eisenhower (born David Dwight Eisenhower; October 14, 1890 – March 28, 1969) was the 34th president of the United States, serving from 1953 to 1961. During World War II, he was Supreme Commander of the Allied Expeditionary Force in Europe and achieved the five-star rank as General of the Army. Eisenhower planned and supervised two of the most consequential military campaigns of World War II: Operation Torch in the North Africa campaign in 1942–1943 and the invasion of Normandy in 1944.

Eisenhower was born in Denison, Texas, and raised in Abilene, Kansas. His family had a strong religious background, and his mother became a Jehovah's Witness. Eisenhower, however, belonged to no organized church until 1952. He graduated from West Point in 1915 and later married Mamie Doud, with whom he had two sons. During World War I, he was denied a request to serve in Europe and instead commanded a unit that trained tank crews. Between the wars he served in staff positions in the US and the Philippines, reaching the rank of brigadier general shortly before the entry of the US into World War II in 1941. After further promotion Eisenhower oversaw the Allied invasions of North Africa and Sicily before supervising the invasions of France and Germany. After the war ended in Europe, he served as military governor of the American-occupied zone of Germany (1945), Army Chief of Staff (1945–1948), president of Columbia University (1948–1953), and as the first supreme commander of NATO (1951–1952).

Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful liberation of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 (D-Day) with the Normandy landings (Operation Neptune). A 1,200-plane airborne assault preceded an amphibious assault involving more than 5,000 vessels. Nearly 160,000 troops crossed the English Channel on 6 June, and more than two million Allied troops were in France by the end of August.

The decision to undertake cross-channel landings in 1944 was made at the Trident Conference in Washington in May 1943. American General Dwight D. Eisenhower was appointed commander of Supreme Headquarters Allied Expeditionary Force, and British General Bernard Montgomery was named commander of the 21st Army Group, which comprised all the land forces involved in the operation. The Normandy coast in northwestern France was chosen as the site of the landings, with the Americans assigned to land at sectors codenamed Utah and Omaha, the British at Sword and Gold, and the Canadians at Juno. To meet the conditions expected on the Normandy beachhead, special technology was developed, including two artificial ports called Mulberry harbours and an array of specialised tanks nicknamed Hobart's Funnies. In the months leading up to the landings, the Allies conducted Operation Bodyguard, a substantial military deception that used electronic and visual misinformation to mislead the Germans as to the date and location of the main Allied landings. Adolf Hitler placed Field Marshal Erwin Rommel in charge of developing fortifications all along Hitler's proclaimed Atlantic Wall in anticipation of landings in France.

Marshal of the Royal Air Force Arthur William Tedder, 1st Baron Tedder, GCB (11 July 1890 – 3 June 1967) was a Royal Air Force officer. He was a pilot and squadron commander in the Royal Flying Corps in the First World War and he went on to serve as a senior officer in the Royal Air Force (RAF) during the inter-war years when he served in Turkey, Great Britain and the Far East.

During World War II, as Air Officer Commanding of the RAF Middle East Command, Tedder directed RAF air operations in the Mediterranean and North Africa, including the evacuation of Crete and Operation Crusader in North Africa. His bombing tactics became known as the "Tedder Carpet". Later in the war Tedder took command of the Mediterranean Air Command and in that role was closely involved in the planning of the Allied invasion of Sicily and the Allied invasion of Italy. When Operation Overlord—the invasion of France—came to be planned, Tedder was appointed Deputy Supreme Commander at Supreme Headquarters Allied Expeditionary Force under General Dwight D. Eisenhower.

General Walter Bedell "Beetle" Smith (5 October 1895 – 9 August 1961) was a senior officer of the United States Army who served as General Dwight D. Eisenhower's chief of staff at Allied Forces Headquarters (AFHQ) during the Tunisia Campaign and the Allied invasion of Italy in 1943, during World War II. He was Eisenhower's chief of staff at the Supreme Headquarters Allied Expeditionary Force (SHAEF) in the campaign in Western Europe from 1944 to 1945.

Smith enlisted as a private in the Indiana Army National Guard in 1911. During World War I, he served with the American Expeditionary Forces and was commissioned to second lieutenant in 1917. He was wounded in the Aisne-Marne Offensive in 1918. After the war, he was a staff officer and instructor at the U.S. Army Infantry School. In 1941, he became secretary of the General Staff, and in 1942 he became the secretary to the Combined Chiefs of Staff. His duties involved taking part in discussions of war plans at the highest level, and Smith often briefed President Franklin D. Roosevelt on strategic matters.