Cunningham became a Knight Grand Cross of the Order of the Bath (GCB), "in recognition of the recent successful combined operations in the Middle East", in March 1941 and was created a baronet, of Bishop's Waltham in the County of Southampton, in July 1942.
From late 1942 to early 1943, he served under General Dwight D. Eisenhower, who made him Naval Commander, Allied Expeditionary Force.
In this role Cunningham commanded the large fleet that covered the Anglo-American landings in North Africa (Operation Torch).
General Eisenhower said of him in his diary:
Admiral Sir Andrew Browne Cunningham.
He remains in my opinion at the top of my subordinates in absolute selflessness, energy, devotion to duty, knowledge of his task, and in understanding of the requirements of allied operations.
My opinions as to his superior qualifications have never wavered for a second.

On 21 January 1943, Cunningham was promoted to Admiral of the Fleet.
 February 1943 saw him return to his post as Commander-in-Chief, Mediterranean Fleet.
Three months later, when Axis forces in North Africa were on the verge of surrender, he ordered that none should be allowed to escape.
Entirely in keeping with his fiery character he signalled the fleet "Sink, burn and destroy: Let nothing pass".
He oversaw the naval forces used in the joint Anglo-American amphibious invasions of Sicily, during Operation Husky, Operation Baytown and Operation Avalanche.
On the morning of 11 September 1943, Cunningham was present at Malta when the Italian Fleet surrendered.
Cunningham informed the Admiralty with a telegram; "Be pleased to inform their Lordships that the Italian battle fleet now lies at anchor under the guns of the fortress of Malta."

In October 1943, Cunningham became First Sea Lord and Chief of the Naval Staff, after the death of Sir Dudley Pound.
This promotion meant that he had to relinquish his coveted post of Commander-in-Chief, Mediterranean, recommending his namesake Admiral John H. D. Cunningham as his successor.
In the position of First Sea Lord, and as a member of the Chiefs of Staff committee, Cunningham was responsible for the overall strategic direction of the navy for the remainder of the war.
He attended the major conferences at Cairo, Tehran, Yalta and Potsdam, at which the Allies discussed future strategy, including the invasion of Normandy and the deployment of a British fleet to the Pacific Ocean.

While the port of Antwerp was vital for the Allies after D-Day, Admirals Cunningham and Ramsay warned SHAEF and Montgomery that the port was of no use while the Germans held the approaches.
But Montgomery postponed the Battle of the Scheldt, and the delay in opening the port was a grave blow to the Allied build-up before winter approached.
Cunningham became a Knight Grand Cross of the Order of the Bath (GCB), "in recognition of the recent successful combined operations in the Middle East", in March 1941 and was created a baronet, of Bishop's Waltham in the County of Southampton, in July 1942. From late 1942 to early 1943, he served under General Dwight D. Eisenhower, who made him Naval Commander, Allied Expeditionary Force. In this role Cunningham commanded the large fleet that covered the Anglo-American landings in North Africa (Operation Torch). General Eisenhower said of him in his diary:
Admiral Sir Andrew Browne Cunningham. He remains in my opinion at the top of my subordinates in absolute selflessness, energy, devotion to duty, knowledge of his task, and in understanding of the requirements of allied operations. My opinions as to his superior qualifications have never wavered for a second.
On 21 January 1943, Cunningham was promoted to Admiral of the Fleet.  February 1943 saw him return to his post as Commander-in-Chief, Mediterranean Fleet. Three months later, when Axis forces in North Africa were on the verge of surrender, he ordered that none should be allowed to escape. Entirely in keeping with his fiery character he signalled the fleet "Sink, burn and destroy: Let nothing pass". He oversaw the naval forces used in the joint Anglo-American amphibious invasions of Sicily, during Operation Husky, Operation Baytown and Operation Avalanche. On the morning of 11 September 1943, Cunningham was present at Malta when the Italian Fleet surrendered. Cunningham informed the Admiralty with a telegram; "Be pleased to inform their Lordships that the Italian battle fleet now lies at anchor under the guns of the fortress of Malta."
In October 1943, Cunningham became First Sea Lord and Chief of the Naval Staff, after the death of Sir Dudley Pound. This promotion meant that he had to relinquish his coveted post of Commander-in-Chief, Mediterranean, recommending his namesake Admiral John H. D. Cunningham as his successor. In the position of First Sea Lord, and as a member of the Chiefs of Staff committee, Cunningham was responsible for the overall strategic direction of the navy for the remainder of the war. He attended the major conferences at Cairo, Tehran, Yalta and Potsdam, at which the Allies discussed future strategy, including the invasion of Normandy and the deployment of a British fleet to the Pacific Ocean.
While the port of Antwerp was vital for the Allies after D-Day, Admirals Cunningham and Ramsay warned SHAEF and Montgomery that the port was of no use while the Germans held the approaches. But Montgomery postponed the Battle of the Scheldt, and the delay in opening the port was a grave blow to the Allied build-up before winter approached.
Andrew Cunningham, 1st Viscount Cunningham of Hyndhope