at the confluence of the Uraricoiera River with the Takutu River, was decisive in the conquest of the Branco River by the Portuguese. The Fort, which no longer exists today, had the main purpose of providing the Portuguese with the total sovereignty of Portugal over the lands of the Branco River Valley, which aroused international greed due to its little exploitation. The Portuguese colonizers, after assuming the sovereignty and total control of the region, created several villages and towns in the locality, together with indigenous natives. Nossa Senhora da Conceição and Santo Antônio, on the Uraricoera River; São Felipe, on the Takutu River and Nossa Senhora do Carmo and Santa Bárbara, on the Branco River, were the main settlements created at the time, housing a significant population number. However, due to the conflicts between the indigenous and the colonizers, because the indigenous people did not accept to submit to the conditions imposed by the Portuguese, the villages did not develop. To guarantee the presence of the Portuguese settlers in the lands of the Branco River Valley, commander Manuel da Gama Lôbo d'Almada started breeding cattle and horses in the territory, in 1789. The farms of São Bento, São José and São Marcos, on the Uraricoera and Takutu rivers, respectively, were the first to permanently introduce cattle and equine breeding, between 1793 and 1799. Currently, the São Marcos farm belongs to the indigenous people and is located in front of the place where Fort São Joaquim was located. For a year, between 1810 and 1811, English soldiers entered the Valley but were expelled by the commander of São Joaquim Fort. The border between Brazil and Guyana, whose border demarcation process had already been closed, needed to be re-marked, due to the great English invasions that occurred in that period. Therefore, the colonization of the Branco River was divided into four periods: From 1750 to the beginning of the 19th century, with the discovery of the Branco River; from the mid-19th century until the creation of the municipality of Boa Vista, in 1890; from 1890 until the creation of the Federal Territory of Rio Branco; and the creation of the Federal Territory of Rio Branco to elevate it to the category of Brazilian federative unit renamed Roraima. Decree-Law No. 5,812 of September 13, 1943, which dismembered the state of Amazonas, created the Federal Territory of Rio Branco. In 1962, the territory was