The countercoup brought in a new governor for the Buenos Aires Province, who would in time become the leading figure of a loose confederation of Argentine Provinces (the so-called Argentine Confederation). Juan Manuel de Rosas made it his mission to stabilize Argentina in a confederacy under the tutelage of Buenos Aires Province. This led to repression, massacres of Native Americans in the Pampas and, in 1838, an international embargo over the case of a French journalist tortured to death at Rosas' orders. An unyielding Rosas might have let the impasse continue for a decade or more; but, Admiral Guillermo Brown made his talents amenable once again, forcing the French blockade to be lifted in 1841.