1783 - A NEW PLAN FOR THE INVASION OF BUENOS AIRES
After the defeat in Colonia del Sacramento by Cevallos, the British captain William Robarts, of the frigate HMS Ambuscade, remained in Rio at the service of Portuguese Navy. Took part of the Portuguese squadron commanded by English Robert McDouall during the 1775-1777 war over Colonia where developed a plan to attack Buenos Aires, which he shared with then-Captain Arthur Phillip, last English defender of Colonia.
This plan was laid by Phillip to the attention of British government and adopted by Thomas Townshend, 1st Viscount of Sydney, State Secretary for the cabinet William Petty Landsdowne. The English fleet under Commodore Robert Kingsmill (1730-1805) departed on January 16, 1783 from Portsmouth to Bs As, but the end of the war halted his execution.