territory, and was in contact with the warlike Bororo of western Brazil. He was so successful in pacifying the Bororo, that he completed the telegraph line with their help. Throughout his life, Rondon laid over 4,000 miles of telegraph line through the jungles of Brazil. Marshall Rondon was honored with the title "Patron of the Communications Corps of the Brazilian Army", by Decree No. 51,960, of 26 April 1963. Later life After the Roosevelt-Rondon Scientific Expedition of 1914, Rondon worked until 1919 mapping the state of Mato Grosso. During this time he discovered some more rivers, and made contact with several indigenous tribes. In 1919, he became chief of the Brazilian Corps of Engineers, and the head of the Telegraphic Commission. In 1924 and 1925, he led army forces against a rebellion in the state of São Paulo. From 1927 to 1930, Rondon was put in charge of surveying all of the borders between Brazil and its neighbors. In 1930, he was interrupted by the Revolution of 1930, and he resigned from his position as head of SPI. During 1934–1938, he was in charge of a Diplomatic Mission, to mediate a dispute between Colombia and Peru over the town of Leticia. In 1939, he resumed his directorship of SPI, and expanded the service to new territories of Brazil. In the 1950s he supported the Villas Boas brothers' campaign, which faced strong opposition from the government and the ranchers of Mato Grosso and led to the establishment of the first Brazilian National Park for indigenous people along the Xingu River in 1961. On 5 May 1955, the date of his 90th birthday, he was awarded the title of Marshal of the Brazilian Army, granted by the National Congress. In 1957, he was nominated for the Nobel Peace Prize by the Explorers Club of New York. He died in 1958 in Rio de Janeiro at the age of 92. Telegraph Commission Cândido Rondon headed up a large-scale military operation to expand telegraph lines into the Brazilian Amazon, this group has also been called “The Rondon Commission.” Rondon was, by this time, a devout follower of positivist beliefs and he believed his purpose was to unite all peoples of Brazil through his work in the commission. He had an unrelenting belief that progress should be made as quickly as possible and that indigenous peoples needed to be incorporated into society as quickly as