The chief lieutenant of Rosas was General Urquiza, whom he had appointed governor of Entre Rios. The latter's generalship overcame the unitarian rebellions in that province and repelled the invasions from Uruguay. Under his wise and moderate rule the province flourished and recovered from the devastations of the previous civil wars. Its fertile plains were covered with magnificent herds of cattle and horses, which fed and mounted an admirable cavalry. Urquiza himself was the greatest rancher in the province and could raise an army from his own estates. Entrenched between the vast-moving floods of the Uruguay and Paraguay, he was practically safe from attack, and his relations with his neighbours in Corrientes, Uruguay, Paraguay, and Brazil were those of warm friendship and alliance, as soon as he had declared against the tyrant, who, seated at the mouth of the Plate, cut off the countries above from free access to the sea. Though Urquiza was a caudillo he had no such ambition for supreme power as plagued Rosas. He was even-tempered, of simple tastes, and careless of military glory. In 1846 the rupture between him and Rosas came, and thenceforth he devoted himself to the overthrow of the tyrant. Three times his attacks failed; but, in 1851, he arranged an alliance with Brazil and with the colorado faction in Uruguay. The war was opened by Urquiza's crossing the Uruguay and, in conjunction with a Brazilian army, suddenly falling upon the blancos, who, in alliance with Rosas, were besieging Montevideo. Most of the defeated forces joined his army, and accompanied by his Brazilian and Uruguayan allies he recrossed the Uruguay and moved over the Entre Rios plains to a point on the Parana just at the head of the delta. The Brazilian fleet penetrated up the river to protect his crossing, and on the 24th of December the entire force of twenty-four thousand men, the largest which up to that time had ever assembled in South America, was safely over and encamped on the dry pampas of Santa Fe. The road to Buenos Aires was open. Rosas could do nothing but wait there and trust all to the result of a single battle. On the 3rd of February he was crushingly defeated in the battle of Caseros, fought within a few miles of the city. Of the twenty thousand men he led into action half proved treacherous, and many of his principal officers betrayed him. He took refuge at the British Legation, and thence was sent on board a man-of-war which carried him into exile. CHAPTER VIII CONSOLIDATION