The British intended to convince the Argentinian forces that an amphibious assault on Port Stanley was imminent, and Admiral Woodward saw Black Buck One as an important contribution to this effort, alongside naval attacks and deception efforts. The author of "Vulcan 607", Rowland White, claimed that Vice Admiral Juan Lombardo was led to believe that Black Buck One was the prelude to a full-scale landing by the British. As a consequence, he ordered Rear Admiral , the commander of the Argentine Sea Fleet, to immediately attack the British fleet. This attack took the form of a pincer movement, with the light cruiser to the south and aircraft carrier to the north. On 2 May, "General Belgrano" was sunk by the submarine . Thereafter the Argentine Navy withdrew to territorial waters and played no further part in the conflict.