Shortly after the establishment of the headquarters, expeditionary was deleted from its title for reasons of operational security. Having overseen the campaign in Tunisia, the invasion of Sicily and the invasion of Italy and the early stages of the Italian Campaign, Eisenhower left AFHQ and returned to England in late 1943 to assume command of the forces assembling for Operation Overlord, codename for the Allied landings in Northern France. He was succeeded at AFHQ by Field Marshal Sir Henry M. Wilson. Wilson's title became Supreme Commander, Mediterranean Theatre of Operations, and the American Forces then came under Lt. Gen Jacob L. Devers, who had been Commanding General, ETO since May 1943. As such Wilson exercised strategic control over the campaign in Italy. He strongly advocated the invasion of Germany via the Danube plain (instead of Operation Dragoon, codename for the Allied invasion of Southern France), but this did not take place as the Allied Armies in Italy (AAI) were constantly weakened to support other theaters of war. Wilson was in command for just under a year, until he was sent to Washington in December 1944 as head of the British Joint Staff Mission. Wilson was succeeded by Field Marshal Sir Harold Alexander who was Supreme Commander and commander of AFHQ until the end of the war.