URQUIZA, Justo Jose de, Argentine soldier and politician: b. near Con cepcion del Uruguay (now in Entre Rios, Ar gentina), 19 March 1800; d. there, 11 April 1870. He was of mixed Spanish and Indian blood and during the war in La Plata in 1835 42 gradually rose in influence until he became a general of division under Rosas, dictator of Buenos Aires. In 1844 he commanded the army sent against Uruguay, and in 1845, at the battle of India Muerte, he defeated Ribera. He was elected governor of Entre Rios in 1846, as leader of the federalist party. His administration of affairs was directed rather to his own glory and gain than to any benefit for the people, but he contrived to maintain a peaceful and prosperous condition of the coun try while strengthening his power, meanwhile acquiring great wealth. In 1851 he turned against Rosas, allied his forces with Brazil and Montevideo, and marched into Uruguay. He forced the capitulation of Oribe 8 Oct. 1851,
then invaded Buenos Aires, and on 3 Feb. 1852 defeated Rosas at Monte Caseros. Urquiza was proclaimed provisional dictator and after the adoption of a federal constitution by the provinces (excepting Buenos Aires) he was in 1853 elected President for a term of six years. In 1859 he forced Buenos Aires to join the confederation, and after the expiration of his term of office took command of the army and endeavored to quell the revolt which had arisen in that country. He was defeated by Mitre at Pavon, 17 Sept. 1861, the result being the aban donment of the federalist constitution for the one since in force. He retired to Entre Rios, where he acted as governor, exercising semi dictatorial powers, though nominally under the authority of the central government. In 1870 a formidable revolt arose, headed by his son-in law, Gen. Lopez Jordan, and Urquiza was at tacked in his palace and killed.