Although being a minority in demographics terms, the Criollo people played a leading role in the May Revolution of 1810, as well as in the independence of Argentina from the Spanish Empire in 1816. Argentine national heroes such as Manuel Belgrano and Juan Martín de Pueyrredón, military men as Cornelio Saavedra and Carlos María de Alvear, and politicians as Juan José Paso and Mariano Moreno were mostly Criollos of Spanish, Italian or French descent. The Second Triumvirate and the 1813 assembly enacted laws encouraging immigration, and instituted advertising campaigns and contract work programs among prospective immigrants in Europe.