VALLE, Leandro del (val'-yay), Mexican soldier, born in the city of Mexico, 27 February, 1833; died in Monte de las Cruces, 23 June, 1861. He was a son of one of the soldiers of the war of independence, entered the military college at, the age of eleven years, and in 1847 was promoted sub-lieutenant by Gomez Farias for bravery in subduing the mutiny of La Profesa. He served in the war against the United States, entered college again in 1850 to finish his studies, and in 1853 was appointed lieutenant of engineers. He was promoted captain by Santa-Anna, but resigned in consequence of the arrest of his father, and took part in the revolution of Ayutla in 1854. His conduct in the siege of Puebla, in 1856, was rewarded by Comonfort with permission to travel in Europe; but the scanty resources that were provided only enabled him to visit the military colleges of France and Prussia, without completing his technical studies, and he returned in 1857. In 1858 he took arms against the reactionary governments of Zuloage and Miramon, served with credit in the capture of Guadalajara, and in May, 1859, was promoted brigadier. Ha served during the whole campaign till the final battle of Calpulalpam, 24 December, 1860, and after the Liberal triumph was elected to congress, resigning the place as military governor of the Federal district. When the reactionary revolution under Leonardo Marquez and other guerilla chiefs began, Valle, notwithstanding his recent betrothal, left his seat in congress to avenge the assassination of Santos Degollado, and took the field as chief of operations in the valley of Mexico. In trying to surprise the guerilla force of Galvez, he was himself surprised by superior numbers under the sanguinary Marquez, and by the latter was ordered to be shot.