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Two ''Minas Geraes-''class battleships were built for the
Brazilian Navy The Brazilian Navy () is the navy, naval service branch of the Brazilian Armed Forces, responsible for conducting naval warfare, naval operations. The navy was involved in War of Independence of Brazil#Naval action, Brazil's war of independence ...
in the early twentieth century. Named and , these "
dreadnought The dreadnought was the predominant type of battleship in the early 20th century. The first of the kind, the Royal Navy's , had such an effect when launched in 1906 that similar battleships built after her were referred to as "dreadnoughts", ...
" warships were intended to be Brazil's first step towards becoming an international power, and they consequently initiated a South American naval arms race. In 1904, Brazil began a major naval building program that included three small battleships. Designing and ordering the ships took two years, but these plans were scrapped after the revolutionary dreadnought concept rendered the Brazilian design obsolete. Two dreadnoughts were instead ordered from the United Kingdom, making Brazil the third country to have ships of this type under construction, before traditional powers like Germany, France, or Russia. As such, the ships created much uncertainty among the major countries in the world, many of whom incorrectly speculated the ships were actually destined for a rival nation. Similarly, they also caused much consternation in Argentina and, consequently, Chile. Soon after their delivery in 1910, both ''Minas Geraes'' and ''São Paulo'' were embroiled in the Revolt of the Lash (''Revolta da Chibata''), in which the crews of four Brazilian ships demanded the abolition of
corporal punishment A corporal punishment or a physical punishment is a punishment which is intended to cause physical pain to a person. When it is inflicted on Minor (law), minors, especially in home and school settings, its methods may include spanking or Padd ...
in the navy. The mutineers surrendered after four days, when a bill was passed granting amnesty to all those involved. In 1922, the two battleships were used to help put down a revolt at
Fort Copacabana Fort Copacabana (, ) is a military base at the south end of the beach that defines the district of Copacabana, Rio de Janeiro, Brazil. The base is open to the public and contains the ''Museu Histórico do Exército'' (Army Historical Museum) and ...
. Two years later, lieutenants on ''São Paulo'' mutinied but found little support from other military units, so they sailed to
Montevideo Montevideo (, ; ) is the capital city, capital and List of cities in Uruguay, largest city of Uruguay. According to the 2023 census, the city proper has a population of 1,302,954 (about 37.2% of the country's total population) in an area of . M ...
,
Uruguay Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...
, and obtained asylum. ''Minas Geraes'' was modernized in the 1930s, but both battleships were too old to participate actively in the
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, and instead were employed as harbor defense ships in Salvador and
Recife Recife ( , ) is the Federative units of Brazil, state capital of Pernambuco, Brazil, on the northeastern Atlantic Ocean, Atlantic coast of South America. It is the largest urban area within both the North Region, Brazil, North and the Northeast R ...
. ''São Paulo'' was sold in 1951 to a British shipbreaker, but was lost in a storm north of the
Azores The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atl ...
while being towed to its final destination. ''Minas Geraes'' was sold to an Italian scrapper in 1953 and towed to
Genoa Genoa ( ; ; ) is a city in and the capital of the Italian region of Liguria, and the sixth-largest city in Italy. As of 2025, 563,947 people live within the city's administrative limits. While its metropolitan city has 818,651 inhabitan ...
the following year.


Background

Brazil's navy fell into obsolescence after an 1889 revolution, which deposed
Emperor The word ''emperor'' (from , via ) can mean the male ruler of an empire. ''Empress'', the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules ...
Dom Pedro II, and an 1893 civil war.Topliss, "The Brazilian Dreadnoughts," 240.Livermore, "Battleship Diplomacy," 32.Martins, "Colossos do mares," 75. Meanwhile, an Argentine–Chilean dispute over the boundary of
Patagonia Patagonia () is a geographical region that includes parts of Argentina and Chile at the southern end of South America. The region includes the southern section of the Andes mountain chain with lakes, fjords, temperate rainforests, and glaciers ...
and control of the
Beagle Channel Beagle Channel (; Yahgan language, Yahgan: ''Onašaga'') is a strait in the Tierra del Fuego, Tierra del Fuego Archipelago, on the extreme southern tip of South America between Chile and Argentina. The channel separates the larger main island of I ...
kindled a naval arms race between the two beginning in the late 1880s and lasting until 1902. Restrictions were placed on the navies of both countries and major vessels under construction in both navies were sold as part of the British-mediated three pacts which ended the dispute, but both countries retained the numerous vessels built in the interim. As such, by the turn of the 20th century the Brazilian Navy lagged far behind the Chilean and Argentine navies in quality and total tonnage, despite Brazil having nearly three times the population of Argentina and almost five times the population of Chile.Scheina, "Brazil," 403. Soaring demand for
coffee Coffee is a beverage brewed from roasted, ground coffee beans. Darkly colored, bitter, and slightly acidic, coffee has a stimulating effect on humans, primarily due to its caffeine content, but decaffeinated coffee is also commercially a ...
and
rubber Rubber, also called India rubber, latex, Amazonian rubber, ''caucho'', or ''caoutchouc'', as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds. Types of polyisoprene ...
brought Brazil an influx of revenue in the early 1900s. Simultaneously, there was a drive on the part of prominent Brazilians, most notably the Baron of Rio Branco, to have the country recognized as an international power.Scheina, ''Naval History'', 80. A large naval acquisition program was drawn up and passed by the
National Congress of Brazil The National Congress () is the legislative body of Brazil's federal government. Unlike the state legislative assemblies and Câmara Municipal, municipal chambers, the Congress is bicameral, composed of the Federal Senate (Brazil), Federal Sena ...
in October 1904 in accordance with their belief that a powerful navy would be crucial to the achievement of this goal, but it was two years before any ships were ordered. Two factions argued over the types of ships to be ordered. One favored a navy centered on a small number of large warships, while the other preferred a larger navy of smaller warships. The latter originally prevailed with a bill authorizing the construction of three small battleships, three
armored cruiser The armored cruiser was a type of warship of the late 19th and early 20th centuries. It was designed like other types of cruisers to operate as a long-range, independent warship, capable of defeating any ship apart from a pre-dreadnought battles ...
s, six
destroyer In naval terminology, a destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or carrier battle group and defend them against a wide range of general threats. They were conceived i ...
s, twelve
torpedo boat A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle. The first designs were steam-powered craft dedicated to ramming enemy ships with explosive spar torpedoes. Later evolutions launched variants of ...
s, three
submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
s, and two river monitors.English, ''Armed Forces'', 108. Though the Brazilian government later eliminated the armored cruisers for monetary reasons, the Minister of the Navy, Admiral Júlio César de Noronha, signed a contract with Armstrong Whitworth for three battleships on 23 July 1906. While the first designs for these ships were derived from the Norwegian coastal defense ship and the British (originally Chilean) , the contracted ships were to follow
Armstrong Whitworth Sir W G Armstrong Whitworth & Co Ltd was a major British manufacturing company of the early years of the 20th century. With headquarters in Elswick, Tyne and Wear, Elswick, Newcastle upon Tyne, Armstrong Whitworth built armaments, ships, locomot ...
's Design 439 (Design 188 in
Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public in 18 ...
' files). They would displace 11,800 long tons (12,000 tonnes), have a speed of , and be protected by belt armor of and deck armor of . Each ship would be armed with twelve guns mounted in six twin turrets. These turrets would be mounted in a hexagonal configuration, similar to the later German s. Alarmed, the American ambassador to Brazil sent a
cablegram Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pi ...
to his
Department of State The United States Department of State (DOS), or simply the State Department, is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs ...
in September 1906, warning them of the destabilization that would occur if the situation devolved into a full naval arms race. At the same time, the American government under
Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...
tried using diplomatic means to coerce the Brazilians into canceling their ships, but the attempts were dismissed, with the Baron of Rio Branco remarking that caving to the American demands would render Brazil as powerless as
suzerain A suzerain (, from Old French "above" + "supreme, chief") is a person, state (polity)">state or polity who has supremacy and dominant influence over the foreign policy and economic relations of another subordinate party or polity, but allows i ...
Cuba. The
President of Brazil The president of Brazil (), officially the president of the Federative Republic of Brazil () or simply the ''President of the Republic'', is the head of state and head of government of Brazil. The president leads the executive branch of the ...
, Afonso Pena, supported the naval acquisitions in an address to the National Congress of Brazil in November 1906, as in his opinion the ships were necessary to replace the antiquated and obsolete vessels of the current navy.


Bidding and construction

Design 439 was modified before these ships were
laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one ...
, increasing the displacement to and making them slightly longer and wider. Two of these ships were laid down by Armstrong at Elswick in
Newcastle upon Tyne Newcastle upon Tyne, or simply Newcastle ( , Received Pronunciation, RP: ), is a City status in the United Kingdom, cathedral city and metropolitan borough in Tyne and Wear, England. It is England's northernmost metropolitan borough, located o ...
(''Minas Geraes'' and ''Rio de Janeiro''), while the other was
subcontract A subcontractor is a person or business which undertakes to perform part or all of the obligations of another's contract, and a subcontract is a contract which assigns part of an existing contract to a subcontractor. A general contractor, prime ...
ed out to Vickers in Barrow (''São Paulo''). However, the new
dreadnought The dreadnought was the predominant type of battleship in the early 20th century. The first of the kind, the Royal Navy's , had such an effect when launched in 1906 that similar battleships built after her were referred to as "dreadnoughts", ...
concept, which was showcased upon the completion of the namesake ship in December 1906, rendered the Brazilian ships obsolete.Topliss, "The Brazilian Dreadnoughts," 246. A transition to a few large warships was finalized with the selection of Rear Admiral Alexandrino Faria de Alencar for the powerful post of minister of the navy.Scheina, ''Naval History'', 81. The money authorized for naval expansion was redirected by de Alencar to building two dreadnoughts, with plans for a third dreadnought after the first was completed, two scout cruisers (which became the ''Bahia'' class), ten destroyers (the ''Pará'' class), and three submarines. The three battleships on which construction had just begun were demolished beginning on 7 January 1907. An entirely new design incorporating the latest dreadnought technology was drawn up by J.R. Perrett, the head of Elswick Ordnance Company, and approved by the Brazilian government on 20 February 1907. Argentina and Chile immediately annulled the 1902 treaty that had ended their naval arms race, and both planned to expand their own navies, though Chile was delayed by a financial depression in 1907 and a major earthquake the next year. , the
lead ship The lead ship, name ship, or class leader is the first of a series or class of ships that are all constructed according to the same general design. The term is applicable to naval ships and large civilian vessels. Large ships are very comple ...
, was laid down by Armstrong on 17 April 1907, while its
sister ship A sister ship is a ship of the same Ship class, class or of virtually identical design to another ship. Such vessels share a nearly identical hull and superstructure layout, similar size, and roughly comparable features and equipment. They o ...
followed thirteen days later at Vickers. Construction of the partial hull needed to launch ''Minas Geraes'' was delayed by a four-month
strike Strike may refer to: People *Strike (surname) * Hobart Huson, author of several drug related books Physical confrontation or removal *Strike (attack), attack with an inanimate object or a part of the human body intended to cause harm * Airstrike, ...
to 10 September 1908, and ''São Paulo'' followed on 19 April 1909.Scheina, ''Naval History'', 321.Scheina, "Brazil," 404.Topliss, "The Brazilian Dreadnoughts," 249."Minas Geraes I," ''Serviço de Documentação da Marinha – Histórico de Navios''."São Paulo I," ''Serviço de Documentação da Marinha – Histórico de Navios''. Both were christened in front of large crowds by the wife of Francisco Régis de Oliveira, the Brazilian ambassador to the United Kingdom.Launch Greatest Warships
" ''The New York Times'', 11 September 1908, 5.
After multiple trials of the speed, endurance, efficiency, and weaponry of the ship, ''Minas Geraes'' was completed and handed over to Brazil on 5 January 1910. ''São Paulo'' followed in July, after its own trials."Gun Trials of the Sao Paulo," ''The Times'', 4 June 1910, 9b. The third dreadnought, which would have been named and was provided for in the original contract, was laid down on 16 March, but as the ship had already been eclipsed by new naval technology (chiefly the advent of
super-dreadnought The dreadnought was the predominant type of battleship in the early 20th century. The first of the kind, the Royal Navy's , had such an effect when launched in 1906 that similar battleships built after her were referred to as "dreadnoughts", ...
s, beginning with the British ), the Brazilian government canceled it on 7 May and asked Armstrong to prepare a new design. At this time, the dreadnought design had not been fully validated, despite the success of the British namesake;Scheina, ''Naval History'', 354. for example, there were still concerns that the ''Minas Geraes'' class'
superfiring Superfiring armament is a naval design technique in which two or more turrets are located one behind the other, with the rear turret located above ("super") the one in front so that it can fire over the first. This configuration meant that both ...
turret arrangement—which had not been utilized on the original ''Dreadnought'', but was also being installed on the American —would cause blast to hurt the crew in the lower turret."The New Brazilian Battleships," ''The Times'', 22 January 1910, 16f. Any immediate concerns, however, were mitigated during the firing tests when no ill effects were observed, though the ''Times'' (London) reported that there were still concerns registered during ''São Paulo''s gun trials in June 1910.


International reaction

The start of work on ''Minas Geraes'' meant that Brazil had become the third country—behind the United Kingdom and the United States but ahead of major powers such as Germany, France, Russia and Japan—to have a dreadnought under construction. The order for the dreadnoughts caused an immediate stir in the United States and Europe; in the words of the British '' Navy League Annual'', they "astonished the naval world". The American ''New York Times'' opened an article on ''Minas Geraes'' launch with "What on paper at least is the most powerful warship ever built for any navy ...", while ''
Scientific American ''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it, with more than 150 Nobel Pri ...
'' called ''Minas Geraes'' "the last word in heavy battleship design and the ... most powerfully armed warship afloat." Some publications, like the American '' Advocate of Peace'', decried the dreadnought purchase for its cost, calling it "a showy and pretentious naval policy seemingly for the sheer indulgence of national pride" and continuing with " inkingmoney into useless warships when, it is understood, foreign money has had to be borrowed for city improvements in Rio de Janeiro is pitiful politics." The British
House of Commons The House of Commons is the name for the elected lower house of the Bicameralism, bicameral parliaments of the United Kingdom and Canada. In both of these countries, the Commons holds much more legislative power than the nominally upper house of ...
debated purchasing the ships in March 1908 to bolster the Royal Navy while simultaneously ensuring they would not be sold to a foreign rival. The topic arose again in July and September, when Arthur Lee expressed his discomfort at the possible final dispositions of the Brazilian ships, as any sale had the potential to disrupt their "
Two-Power Standard The history of the Royal Navy reached an important juncture in 1707, when the Acts of Union 1707, Act of Union merged the kingdoms of Kingdom of England, England and Kingdom of Scotland, Scotland into the Kingdom of Great Britain, following a c ...
". '' International Marine Engineering'' analyzed the effect of a sale to Japan, stating that the total broadside weight of Japan's
line of battle The line of battle or the battle line is a tactic in naval warfare in which a fleet of ships (known as ships of the line) forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for date ...
would be increased by 31.6%, and the only ships capable of matching the ''Minas Geraes'' in the near future would be the American and German es. Newspapers and journals around the world speculated that Brazil was acting as a proxy for a naval power which would take possession of the two dreadnoughts soon after completion, as they did not believe that a previously insignificant geopolitical power would contract for such powerful armament. The evidence for a sale seemed strong, as Brazilian attempts to float a multi-million-dollar loan against the value of their coffee crop in 1908 were unsuccessful.Topliss, "The Brazilian Dreadnoughts," 247. With three dreadnoughts planned (including the upcoming ), a Spanish naval journal stated "it was only natural that rumors ould beginto circulate supporting the argument that Brazil acted as an intermediary for some great power which would acquire them before they terminate their construction." Various British papers speculated that either the Germans, Japanese, or Americans were actually buying the ships, while naval experts in Germany thought the Americans, British, or Japanese were going to take them over. On the other side of the Atlantic, some American papers theorized that the ships would be sold to the United Kingdom, Germany, or Japan.Germany May Buy English Warships
" ''The New York Times'', 9 August 1908, C8.
The Brazilian government was forced to deny these spurious allegations several times. The ''New York Times'' remarked: Despite the speculation, the United States quickly began courting Brazil as an ally; caught up in the spirit, US naval journals began using terms like "Pan Americanism" and "Hemispheric Cooperation". In South America, the ships came as a rude shock and kindled a naval arms race among Brazil, Argentina, and Chile. The 1902 treaty between the latter two was canceled upon the Brazilian dreadnought order so both could be free to build their own dreadnoughts. Argentina in particular was alarmed at the possible power of the ships. The
Minister of Foreign Affairs In many countries, the ministry of foreign affairs (abbreviated as MFA or MOFA) is the highest government department exclusively or primarily responsible for the state's foreign policy and foreign relations, relations, diplomacy, bilateralism, ...
, Manuel Augusto Montes de Oca, remarked that either ''Minas Geraes'' or ''São Paulo'' could destroy the entire Argentine and Chilean fleets. While this may have been hyperbole, either one was much more powerful than any single vessel in the Argentinian fleet. As such, the Argentines quickly responded to the dreadnoughts with an order to the United States for two of their own, the , while Chile ordered two of the from the United Kingdom.


Ships


Service histories

After completion, both ''Minas Geraes'' and ''São Paulo'' sailed to other countries before arriving in Brazil. ''Minas Geraes'' left the Tyne on 5 February 1910 and traveled to
Plymouth Plymouth ( ) is a port city status in the United Kingdom, city and unitary authority in Devon, South West England. It is located on Devon's south coast between the rivers River Plym, Plym and River Tamar, Tamar, about southwest of Exeter and ...
before beginning a voyage to the United States on 8 February. The ship was assigned to escort the American armored cruiser , carrying the body of the former Brazilian ambassador to the United States
Joaquim Nabuco Joaquim Aurélio Barreto Nabuco de Araújo (August 19, 1849 – January 17, 1910) was a Brazilian writer, statesman, and a leading voice in the abolitionist movement of his country. Early life and education Born in Brazil, Joaquim was the s ...
, to Rio de Janeiro.Martins, "Colossos do mares," 76. They arrived in the city on 17 April 1910. ''São Paulo'' left
Greenock Greenock (; ; , ) is a town in Inverclyde, Scotland, located in the west central Lowlands of Scotland. The town is the administrative centre of Inverclyde Council. It is a former burgh within the historic county of Renfrewshire, and forms ...
on 16 September 1910,Whitley, ''Battleships'', 28. and stopped in
Cherbourg Cherbourg is a former Communes of France, commune and Subprefectures in France, subprefecture located at the northern end of the Cotentin peninsula in the northwestern French departments of France, department of Manche. It was merged into the com ...
, France, to embark the
Brazilian President The president of Brazil (), officially the president of the Federative Republic of Brazil () or simply the ''President of the Republic'', is the head of state and head of government of Brazil. The president leads the executive branch of the ...
Hermes da Fonseca Hermes Rodrigues da Fonseca (; 12 May 1855 – 9 September 1923) was a Brazilian field marshal and politician who served as the eighth president of Brazil between 1910 and 1914. He was a nephew of marshal Deodoro da Fonseca, the first president o ...
. Departing on the 27th, ''São Paulo'' voyaged to
Lisbon Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
, Portugal, where Fonseca was a guest of Portugal's King Manuel II. Soon after they arrived, the
5 October 1910 revolution 5 October 1910 Revolution () was the overthrow of the centuries-old List of Portuguese monarchs, Portuguese monarchy and its replacement by the First Portuguese Republic. It was the result of a ''coup d'état'' organized by the Portuguese Repub ...
began.Keeping Good Order in New Republic
" ''The New York Times'', 8 October 1910, 1–2.
Although the President offered
political asylum The right of asylum, sometimes called right of political asylum (''asylum'' ), is a juridical concept, under which people persecuted by their own rulers might be protected by another sovereignty, sovereign authority, such as a second country or ...
to the King and his family, the offer was refused.Ribeiro, "Os Dreadnoughts." There was a rumor that the King was on board and revolutionaries attempted to search the ship, but were denied permission. They also asked for Brazil to land marines "to help in the maintenance of order," but this request was also denied. ''São Paulo'' left Lisbon on 7 October for Rio de Janeiro, and docked there on 25 October.


Revolt of the Lash

Soon after ''São Paulo''s arrival, a major rebellion known as the Revolt of the Lash, or ''Revolta da Chibata'', broke out on four of the newest ships in the Brazilian Navy. The initial spark was provided on 16 November 1910 when
Afro-Brazilian Afro-Brazilians (; ), also known as Black Brazilians (), are Brazilians of total or predominantly Sub-Saharan African ancestry. Most multiracial Brazilians also have a range of degree of African ancestry. Brazilians whose African features are mo ...
sailor Marcelino Rodrigues Menezes was brutally flogged 250 times for insubordination. Many Afro-Brazilian sailors were sons of former slaves, or were former slaves freed under the ''
Lei Áurea The (; ), officially Law No. 3,353 of 13 May 1888, is the law that abolished slavery in Brazil. It was signed by Isabel, Princess Imperial of Brazil (1846–1921), an opponent of slavery, who acted as regent to Emperor Pedro II of Brazil, ...
'' (abolition) but forced to enter the navy. They had been planning a revolt for some time, and Menezes became the catalyst. Further preparations were needed, so the rebellion was delayed until 22 November. The crewmen of ''Minas Geraes'', ''São Paulo'', the twelve-year-old , and the new quickly took their vessels with only a minimum of bloodshed: two officers on ''Minas Geraes'' and one each on ''São Paulo'' and ''Bahia'' were killed. The ships were well-supplied with foodstuffs, ammunition, and coal, and the only demand of mutineers—led by João Cândido Felisberto—was the abolition of "slavery as practiced by the Brazilian Navy". They objected to low pay, long hours, inadequate training for incompetent sailors, and punishments including ''bôlo'' (being struck on the hand with a
ferrule A ferrule (a corruption of Latin ' "small bracelet", under the influence of ' "iron") is any of a number of types of objects, generally used for fastening, joining, sealing, or reinforcement. They are often narrow circular rings made from m ...
) and the use of whips or lashes (''chibata''), which eventually became a symbol of the revolt. By the 23rd, the National Congress had begun discussing the possibility of a general
amnesty Amnesty () is defined as "A pardon extended by the government to a group or class of people, usually for a political offense; the act of a sovereign power officially forgiving certain classes of people who are subject to trial but have not yet be ...
for the sailors. Senator
Ruy Barbosa Ruy Barbosa de Oliveira (5 November 1849 – 1 March 1923), also known as Rui Barbosa, was a Brazilian politician, writer, jurist, and diplomat. He was a prominent defender of civil liberties who called for the abolition of slavery in Brazi ...
, long an opponent of slavery, lent a large amount of support, and the measure unanimously passed the Federal Senate on 24 November. The measure was then sent to the
Chamber of Deputies The chamber of deputies is the lower house in many bicameral legislatures and the sole house in some unicameral legislatures. Description Historically, French Chamber of Deputies was the lower house of the French Parliament during the Bourb ...
. Humiliated by the revolt, naval officers and the president of Brazil were staunchly opposed to amnesty, so they quickly began planning to assault the rebel ships. The former believed such an action was necessary to restore the service's honor. Late on the 24th, the President ordered the naval officers to attack the mutineers. Officers crewed some smaller warships and the cruiser , ''Bahia''s sister ship with ten 4.7-inch guns. They planned to attack on the morning of the 25th, when the government expected the mutineers would return to
Guanabara Bay Guanabara Bay (, , ) is an oceanic bay in Southeast Brazil in the state of Rio de Janeiro (state), Rio de Janeiro. On its western shore lie the cities of Rio de Janeiro (city), Rio de Janeiro and Duque de Caxias, Rio de Janeiro, Duque de Caxias, a ...
. When they did not return and the amnesty measure neared passage in the Chamber of Deputies, the order was rescinded. After the bill passed 125–23 and the president signed it into law, the mutineers stood down on the 26th. During the revolt, the ships were noted by many observers to be well-handled, despite a previous belief that the Brazilian Navy was incapable of effectively operating the ships even before being split by a rebellion. João Cândido Felisberto ordered all liquor thrown overboard, and discipline on the ships was recognized as exemplary. The 4.7-inch guns were often used for shots over the city, but the 12-inch were not, which led to a suspicion among the naval officers that the rebels were incapable of using the weapons. Later research and interviews indicate that ''Minas Geraes'' guns were fully operational, and while ''São Paulo''s could not be turned after salt water contaminated the
hydraulic Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concer ...
system, British engineers still on board the ship after the voyage from the United Kingdom were working on the problem. Still, historians have never ascertained how well the mutineers could handle the ships.Scheina, ''Latin America's Wars'', 73.


Later career

Three years after the mutiny, ''Minas Geraes'' was used to transport Brazilian
Minister of Foreign Affairs In many countries, the ministry of foreign affairs (abbreviated as MFA or MOFA) is the highest government department exclusively or primarily responsible for the state's foreign policy and foreign relations, relations, diplomacy, bilateralism, ...
Lauro Müller to the United States."E Minas Geraes," ''Navios De Guerra Brasileiros''. The ship returned on 16 July and arrived in Rio de Janeiro on 16 August. In September both ''Minas Geraes'' and ''São Paulo'' participated in a major exercise with most of the Brazilian Navy. The need for a more modern fire control system was identified as early as late 1913, but no action was taken."E São Paulo," ''Navios De Guerra Brasileiros''. When Brazil entered the
First World War World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
in 1917, they were offered to the United Kingdom for service in the
Grand Fleet The Grand Fleet was the main battlefleet of the Royal Navy during the First World War. It was established in August 1914 and disbanded in April 1919. Its main base was Scapa Flow in the Orkney Islands. History Formed in August 1914 from th ...
, but the British declined due to the condition the ships were in. They had not been modernized since entering service, and maintenance had been neglected; to illustrate the problem, when Brazil sent ''São Paulo'' to the United States for a modernization in June 1918, fourteen of the eighteen
boiler A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, centra ...
s that powered the ship failed. The ship only finished the voyage to New York with the assistance of the American battleship and cruiser . ''Minas Geraes'' followed after its sister's return, and the modernization was done between 1 September 1920 and 1 October 1921.Whitley, ''Battleships'', 26. ''São Paulo'' made two trips to Europe in 1920. The first conveyed King Albert I and Queen Elisabeth of
Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
to Brazil for the centennial celebrations. After ''São Paulo'' brought them home, the ship traveled to Portugal to take the bodies of the formerly-exiled Emperor Pedro II and his wife, Teresa Cristina, back to Brazil. In July 1922, both battleships helped to quash the first of the
Tenente revolts Tenentism () was a political philosophy of junior army officers (, , "lieutenants") who significantly contributed to the Brazilian Revolution of 1930 that ended the First Brazilian Republic. Background The first decades of the 20th century saw ...
(''Revolução Tenentista''), in which the garrison of Rio de Janeiro's
Fort Copacabana Fort Copacabana (, ) is a military base at the south end of the beach that defines the district of Copacabana, Rio de Janeiro, Brazil. The base is open to the public and contains the ''Museu Histórico do Exército'' (Army Historical Museum) and ...
rebelled and began bombarding the city. ''São Paulo'' shelled the fort, and the rebels surrendered shortly thereafter; ''Minas Geraes'' did not fire its guns.Poggio, "Um encouraçado." In 1924, three lieutenants, including Hercolino Cascardo, took over ''São Paulo'' with other crewmen. They were unsuccessful in swaying any other ships to their cause, except for an old torpedo boat, and soon sailed out of the harbor after firing a six-pounder gun at ''Minas Geraes''. Short of food and with
condensers __NOTOC__ Condenser may refer to: Heat transfer * Condenser (heat transfer), a device or unit used to condense vapor into liquid. Specific types include: ** Heat exchanger#HVAC and refrigeration air coils, HVAC air coils ** Condenser (laboratory), ...
in poor condition, the rebels sailed to
Montevideo Montevideo (, ; ) is the capital city, capital and List of cities in Uruguay, largest city of Uruguay. According to the 2023 census, the city proper has a population of 1,302,954 (about 37.2% of the country's total population) in an area of . M ...
, where they received asylum. ''Minas Geraes'' followed ''São Paulo'', arriving on 11 November and taking back possession of the ship. ''Minas Geraes'' was modernized at the Rio de Janeiro Naval Yard from June 1931 to 1938,Topliss, "The Brazilian Dreadnoughts," 289. while ''São Paulo'' led a naval force that
blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are ...
d Santos during the Constitutionalist Revolution of 1932. Though Brazil had also intended to modernize ''São Paulo'', its poor condition—it was only able to make instead of its designed speed of —made such action uneconomical.Whitley, ''Battleships'', 29. Soon after Brazil's entrance into the
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
on 21 August 1942, ''São Paulo'' was moved to
Recife Recife ( , ) is the Federative units of Brazil, state capital of Pernambuco, Brazil, on the northeastern Atlantic Ocean, Atlantic coast of South America. It is the largest urban area within both the North Region, Brazil, North and the Northeast R ...
on 23 August to defend that port as a harbor defense ship; ''Minas Geraes'' played a similar role at Salvador. Even with the modernization, ''Minas Geraes'' was simply too old and vulnerable to actively participate in the war. Both ships were decommissioned after the war, ''São Paulo'' on 2 August 1947 and ''Minas Geraes'' on 31 December 1952. The former was sold to a British shipbreaker and was towed out of Rio de Janeiro on 20 September 1951. When north of the
Azores The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atl ...
in a strong storm, the tow line snapped. Though multiple searches were mounted by American and British aircraft, the ship was never found. ''Minas Geraes'' was sold to an Italian company in 1953 and towed to
Genoa Genoa ( ; ; ) is a city in and the capital of the Italian region of Liguria, and the sixth-largest city in Italy. As of 2025, 563,947 people live within the city's administrative limits. While its metropolitan city has 818,651 inhabitan ...
from 11 March 1954 to 22 April.


Specifications

The two ships of the ''Minas Geraes'' class were overall, at the waterline, and
between perpendiculars Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the ster ...
. They had a beam of , a mean
draft Draft, the draft, or draught may refer to: Watercraft dimensions * Draft (hull), the distance from waterline to keel of a vessel * Draft (sail), degree of curvature in a sail * Air draft, distance from waterline to the highest point on a v ...
of , a maximum draft of , a normal displacement of 18,976
long ton The long ton, also known as the imperial ton, displacement ton,Dictionary.com - ''"a unit for measuring the displacement of a vessel, equal to a long ton of 2240 pounds (about 1016 kg) or 35 cu. ft. (1 cu. m) of seawater."'' or British ton, is a ...
s (19,281 t), and a displacement of at full load. At the beginning of their careers, the ships were crewed by about 900 men. ''Minas Geraes'' and ''São Paulo'' were originally armed with twelve 12-inch/45
caliber In guns, particularly firearms, but not #As a measurement of length, artillery, where a different definition may apply, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge ( ...
, twenty-two 4.7-inch/50 caliber, eighteen 3-pounders and eight 1-pounder naval guns. The
main battery A main battery is the primary weapon or group of weapons around which a warship is designed. As such, a main battery was historically a naval gun or group of guns used in volleys, as in the broadsides of cannon on a ship of the line. Later, th ...
was arranged with four
superfiring Superfiring armament is a naval design technique in which two or more turrets are located one behind the other, with the rear turret located above ("super") the one in front so that it can fire over the first. This configuration meant that both ...
turrets, two each fore and aft, and two placed ''En echelon (turret arrangement), en echelon''. The 4.7-inch secondary guns were placed in casemates along the side of the ship. The propulsion of the two ships was provided by Vickers vertical triple expansion engines instead of the steam turbines being used to power most contemporary dreadnoughts. Eighteen boilers provided power to the engines, which in turn rotated the two three-bladed propellers with 23,500 shaft horsepower. Their designed top speed was , though this was frequently unattainable in their later careers owing to substandard maintenance and neglect. The ships could carry of coal and of oil, and their original endurance was when traveling at .Topliss, "The Brazilian Battleship," 250. During its trials, ''Minas Geraes'' was able to steam at .Earle, "Professional Notes," 306. The main armor belt was Krupp cemented armour, Krupp cemented and nine inches (230 mm) thick, but narrowed to six and three inches (150 and 76 mm) closer to each end of the ships. The barbettes were protected by nine-inch armor, while the turret had a twelve-inch (300 mm) front, eight-inch (200 mm) sides, and a two- to three-inch (51 to 76 mm) top, and the conning tower had twelve-inch armor. The deck armor had multiple decks of one-and-a-half to two inches (38 to 51 mm), one inch (25 mm), and one inch.


Footnotes


Endnotes


References

*
Brazil
" ''Journal of the American Society of Naval Engineers'' 20, no. 3 (1909): 833–836. . . *
British-Brazilian Warships
" ''The Navy'' (Washington) 2, no. 1 (1908): 11–12. . * Campbell, John. ''Naval Weapons of World War II''. Annapolis: Naval Institute Press, 1985. . . * Campbell, N.J.M. "Germany." In Gardiner and Gray, ''Conway's'', 134–189. *

" ''Navios De Guerra Brasileiros''. Last modified 7 June 2009. *

" ''Navios De Guerra Brasileiros''. Last modified 28 April 2009. * Earle, Ralph.
Professional Notes
" ''Proceedings'' 38, no. 1 (1912): 303–80. . * English, Adrian J. ''Armed Forces of Latin America''. London: Jane's Publishing Inc., 1984. . . * Gardiner, Robert and Randal Gray, eds. ''Conway's All the World's Fighting Ships 1906–1921''. Annapolis: Naval Institute Press, 1985. . . * Seward W. Livermore, Livermore, Seward W. "Battleship Diplomacy in South America: 1905–1925." ''The Journal of Modern History'' 16, no. 1 (1944): 31–44. . . . * Martins, João Roberto, Filho.
Colossos do mares
[Colossuses of the Seas]." ''Revista de História da Biblioteca Nacional'' 3, no. 27 (2007): 74–77. . . * Mead, Edwin D. "Reaction in South America." ''Advocate of Peace'' 70, no. 10 (1908): 238–241. . . *
Minas Geraes I
" ''Serviço de Documentação da Marinha – Histórico de Navios''. Diretoria do Patrimônio Histórico e Documentação da Marinha, Departamento de História Marítima. Accessed 27 January 2015. * Morgan, Zachary R. "The Revolt of the Lash, 1910." In ''Naval Mutinies of the Twentieth Century: An International Perspective'', edited by Christopher M. Bell and Bruce A. Elleman, 32–53. Portland, Oregon: Frank Cass Publishers, 2003. . . * Office of Naval Intelligence (ONI)
''Information Concerning Some of the Principal Navies of the World; A Series of Tables Compiled to Answer Popular Inquiry''
Washington, D.C.: U.S. Government Printing Office, 1912. . * Poggio, Guilherme.

[A Battleship against the Fort: Part 2]." n.d. Poder Naval Online. Last modified 12 April 2009. * Preston, Antony. "Great Britain." In Gardiner and Gray, ''Conway's'', 1–104. * Ribeiro, Paulo de Oliveira.
Os Dreadnoughts da Marinha do Brasil: Minas Geraes e São Paulo
[The Dreadnoughts of the Brazilian Navy: Minas Geraes and São Paulo]." Poder Naval Online. Last modified 15 June 2009. *
São Paulo I
" ''Serviço de Documentação da Marinha – Histórico de Navios''. Diretoria do Patrimônio Histórico e Documentação da Marinha, Departamento de História Marítima. Accessed 27 January 2015. * Scheina, Robert L. "Argentina." In Gardiner and Gray, ''Conway's'', 400–403. * ———. "Brazil." In Gardiner and Gray, ''Conway's'', 403–407. * ———. ''Latin America: A Naval History 1810–1987''. Annapolis: Naval Institute Press, 1987. . . * ———. ''Latin America's Wars''. Washington, D.C.: Brassey's, 2003. . . *
The Brazilian Battleship "Minas Geraes"
" ''Journal of the United States Artillery'' 33, no. 2 (1910): 179–188. . . * "The Brazilian Battleship "Minas Geraes"." ''Scientific American'' 102, no. 12 (1910): 240–241. . . *
The Brazilian Dreadnoughts
" ''International Marine Engineering'' 13, no. 8 (1908): 362–363. . . *
The Brazilian "Dreadnoughts"
" ''The Navy'' (Washington) 2, no. 6 (1908): 13–14. . *
The Reported Purchase of Dreadnoughts
" ''The Navy'' (Washington) 2, no. 7 (1908): 39. . * Topliss, David. "The Brazilian Dreadnoughts, 1904–1914." ''Warship International'' 25, no. 3 (1988), 240–289. . . * Vanterpool, Alan. "The Riachuleo." ''Warship International'' 6, no. 2 (1969): 140–141. * Whitley, M.J. ''Battleships of World War Two: An International Encyclopedia''. Annapolis: Naval Institute Press, 1998. . .


External links


British diplomatic documents
relating to the dreadnought race (FO 508/8
Adam Matthew
subscription required) * *
''Minas Geraes''
on Flickr (Library of Congress)
Plans for the Brazilian Battleship Minas Geraes (1906)
(US National Archives) {{DEFAULTSORT:Minas Geraes Class Battleship Battleship classes Minas Geraes-class battleships, Battleships of the United Kingdom