demands by emancipation. However the enormous pressure and influence of the local society has made the provincial government gave in and finally initiate negotiations for the creation of the municipality of Marabá. That culminated on February 27, 1913 Maraba achieved political autonomy and became a municipality. The first mayor of Maraba was the military Antonio Maia, who took office as appointed by the President of the Province of Grão-Pará. In subsequent years the migratory flow to the region of Marabá increased considerably. During the 1920s, immigrants moved to Maraba mainly to participate in the extraction and sale of Brazil nuts, andiroba, copaiba oils and rubber. And from the 1930s moved to Maraba, in order to work in the diamond mines that were on the banks of the Tocantins River. In 1929, Marabá becomes illuminated by a power plant that operated the base from burning wood. In November 1935 the local airport is opened and the first plane lands in this. Maraba in this period consists of 450 houses and 1.500 inhabitants fixed. The 1970s With the construction of Highway PA-70, in 1969, Maraba is connected to the Belém-Brasília Highway. The implementation of road infrastructure was part of the Brazilian military government's strategy to integrate the Amazon region to the rest of the country. All this was part of the integration strategy of the Amazon territory, especially the region of Marabá, where was undertaken mainly the official plan of agricultural colonization, the construction of the Tucuruí Hydroelectric Power, the implementation of "Projeto Grande Carajás" (Greater Carajas Project), and even the discovery of large gold deposits of the Serra Pelada. All these projects were centered in Marabá, and contributed to the economic and population boom that occurred in the city between 1970 and 1980. In 1970 the city was declared a National Security Area (legal position allowing direct intervention of the Brazilian central government), a condition that lasted until the end of the Brazilian military dictatorship in 1985. Besides having strategic importance to the policy of national integration, Marabá region was the only region of Brazil where there was fighting between the army and the guerrillas of the PCdoB party who want to topple the military regime and establish a communist regime in Brazil. Then performed an Araguaia guerrilla movement, which forced the Brazilian government to Marabá to send a large contingent of troops of the Brazilian Army. The city has become