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World War I
On 26 March 1918 the French marshal Ferdinand Foch was appointed Supreme Allied Commander gaining command of all Allied forces everywhere and co-ordinated the English French American and Italian armies to stop the German spring offensive the last large offensive of the German Empire. He was the one who accepted the German cessation of hostilities in his private train.
On 14 April 1918 at his own request Foch was appointed "Commander in Chief of the Allied Armies". Despite his promotion 19 days earlier and the subsequent Beauvais Conference of 3 April 1918 he was not provided a title. He remedied this by making up his own title and by writing to Prime Minister Clemenceau to request it which was immediately granted. This is important because the Doullens Conference of 26 March was kept a secret until 30 March and still not known to most of the army once it was published.
World War II
During World War II the Allied leaders appointed Supreme Allied Commanders to manage the multi-nation multi-discipline fighting forces for a particular theatre of war. These Supreme Allied Commanders were given operational control over all air land and sea units in that theatre. In other cases senior commanders were given the title Commander-in-Chief.
These Supreme Allied Commanders were drawn from the most senior leaders in the British Armed Forces and United States Armed Forces. These commanders reported to the British/American Combined Chiefs of Staff although in the case of the Pacific and South East Asia the relevant national command authorities of the American Joint Chiefs of Staff or the British Chiefs of Staff Committee had responsibility for the main conduct of the war in the theatre depending on the Supreme Commander's nationality.
General of the Army Dwight D. Eisenhower served in successive Supreme Allied Commander roles. Eisenhower was the Commander-in-Chief Allied Force for the Mediterranean theatre. Eisenhower then served as Supreme Commander Allied Expeditionary Force (SCAEF) in the European theatre starting in December 1943 with the creation of the command to execute Operation Overlord and ending in July 1945 shortly after the End of World War II in Europe. In 1951 Eisenhower would again be a Supreme Allied Commander the first to hold the post for NATO (see next section).
Field Marshal Henry Maitland Wilson succeeded Eisenhower in the Mediterranean theatre given the title Supreme Allied Commander Mediterranean. Wilson was succeeded by Field Marshal Harold Alexander who continued in charge of those Allied forces until the end of the war.
Admiral of the Fleet Lord Louis Mountbatten was Supreme Allied Commander South East Asia (SACSEA) throughout most of its existence. He replaced General Archibald Wavell.
Generalissimo Chiang Kai-shek was named the Supreme Commander of Allied forces in the China war zone (CBI) on 1942. However US forces in practice were usually overseen by General Joseph Stilwell the Deputy Allied Commander in China and South East Asia Command (SEAC). Until late 1944 that the land forces chain of command was clarified after Stilwell was recalled to Washington. His overall role and the CBI command were then split among three people: Lt Gen. Raymond Wheeler became Deputy Supreme Allied Commander South East Asia; Maj. Gen. Albert Wedemeyer became Chief of Staff to Chiang and commander of US Forces China Theater (USFCT). Lt Gen. Daniel Sultan was promoted from deputy commander of CBI to commander of US Forces India-Burma Theater (USFIBT) and commander of the NCAC.
General of the Army Douglas MacArthur was appointed Supreme Allied Commander South West Pacific Area (SWPA) on 18 April 1942. However he preferred to use the title Commander-in-Chief. During the Allied occupation of Japan following the war MacArthur held the title of Supreme Commander for the Allied Powers (SCAP).The Pacific Ocean Areas (POA) divided into the Central Pacific Area the North Pacific Area and the South Pacific Area :652–653 were commanded by Admiral Chester W. Nimitz Commander-in-Chief Pacific Ocean Areas.
Present titles in NATO
The term came into use again with the formation of NATO in 1949. In 1952 Allied Command Europe was established led by Eisenhower. He became the Supreme Allied Commander (SACEUR). Soon afterwards Allied Command Atlantic was established at Norfolk Virginia under Lynde McCormick a U.S. Navy admiral. His title was Supreme Allied Commander Atlantic (SACLANT) and the entire command was usually known as SACLANT. Both Supreme Commander have until 2009 been American with a deputy commander from another NATO member though only British and Germans have held the post.
In June 2003 the commands were reshuffled. One command was given responsibility for operations and one for transforming the military components of the alliance to meet new challenges. In Europe Allied Command Operations was established from the former Allied Command Europe and given responsibility for all NATO military operations worldwide. However for legal reasons[further explanation needed] SACEUR retained the traditional title including Europe. In the United States SACLANT was decommissioned and Allied Command Transformation established. The headquarters of ACT is at the former SACLANT headquarters in Norfolk Virginia USA. Each has a Supreme Allied Commander as its commander.
Allied Command Operations (ACO) has its headquarters at Supreme Headquarters Allied Powers Europe (SHAPE) at Mons Belgium. It is headed by the Supreme Allied Commander Europe (SACEUR) a U.S. four-star general or admiral also heading U.S. European Command. The current Commander is General Tod Wolters (Air Force) who succeeded General Curtis M. Scaparrotti (Army).
Allied Command Transformation (ACT) is located in Norfolk Virginia USA. It is headed by the Supreme Allied Commander Transformation (SACT) a four-star general or admiral. General Stéphane Abrial the commander from 2009 until 2012 was the first non-American to hold a supreme commander role within NATO. Since then this position has been held by a French Air Force officer. The commander of the organization is currently General André Lanata.
Supreme Allied Commander is the title held by the most senior commander within certain multinational military alliances. It originated as a term used by the Allies during World War I and is currently used only within NATO - for Supreme Allied Commander Europe and Supreme Allied Commander Transformation.