The relations of Rosas with the foreign Powers soon grew strained. He fell foul of the French and British nations, and as a result the allied fleets arrived off the mouth of the River Plate and blockaded Buenos Aires. The outcome of this, however, was purely negative. Although the Republic suffered inconvenience from the cessation of trade, the community was self-supporting, while it was impossible, of course, for the European forces to attempt to carry on land operations. Thus, after a prolonged stay in the waters of the River Plate, the blockade was raised, and the French and British fleets sailed away, having to all intents and purposes failed to achieve their object. The extraordinary force of Rosas's character is best instanced by the length of his rule. This, as has been said, continued for over twenty years, until the year 1852. That a Dictator should have continued to hold the reins of power for this length of time in the face of the opposition and hatred which, although smothered, were rampant on every side of him was undoubtedly a most amazing feat. His political end, when it came, was a rapid one. After having humbled every aspirant who strove to challenge his power, he was confronted by General Urquiza, who had for years dominated the province of Entre Rios. The numbers of the actively discontented had now reached truly formidable dimensions. Brazil and Uruguay both came to the assistance of those Argentines who were disposed to attempt rebellion afresh, after years of enforced and trembling peace. A large army composed of Argentines, Brazilians, and Uruguayans, under the joint command of the Brazilian Marquis de Caxias and General Urquiza, crossed the Parana River, invaded the province of Buenos Aires, defeated Rosas's troops, and advanced on the capital. On February 3, 1852, the fateful Battle of Caseros was fought, rather less than ten miles from the town of Buenos Aires. The terrified civilian inhabitants of the town awaited the result in profound suspense. All the while the fight was raging a succession of messengers came galloping through the streets bearing contradictory fragments of news. After some hours the citizens were no longer left in doubt. The stragglers of Rosas's beaten army came pouring into the town, and it became known that the Dictator, completely defeated, had fled. General Rosas and his daughter were received on a British warship, and sailed for Southampton, in which town the famous leader remained until the day of his death.