Provinces of Argentina Aires Province accepted the 1853 Constitution of Argentina in 1861, and its capital city was made a federal territory in 1880. A law from 1862 designated as national territories those under federal control but outside the frontiers of the provinces. In 1884 they served as bases for the establishment of the governorates of Misiones, Formosa, Chaco, La Pampa, Neuquén, Río Negro, Chubut, Santa Cruz and Tierra del Fuego. The agreement about a frontier dispute with Chile in 1900 created the National Territory of Los Andes; its lands were incorporated into Jujuy, Salta and Catamarca in 1943. La Pampa and Chaco
2015 Argentine general election numerous provinces also elected governors, with the new ones beginning their terms on 10 December 2015. These provinces were Buenos Aires province, Catamarca, Chubut, Entre Ríos, Formosa, Jujuy, La Pampa, Misiones, San Juan, San Luis and Santa Cruz, encompassing 11 of the country's 23 provinces. The other provinces elected governors in different days of 2015; the only exceptions were Corrientes and Santiago del Estero whose governors' terms were not due to finish in 2015. María Eugenia Vidal was elected governor of the populous Buenos Aires Province, defeating the controversial Aníbal Fernández; her victory influenced as well the growth of Macri