Explore 29 August

Explore 29 August: the Treaty of Nanking ends the First Opium War, Süleyman the Magnificent crushes Hungary at Mohács, the Soviet Union tests its first atomic bomb, Portugal recognises Brazil’s independence and two kings meet on a bridge at Picquigny. Born today: Jean-Baptiste Colbert, Maurice Maeterlinck and Ingrid Bergman.

This day through time →15 verified events across 4 eras

HMS Cornwallis and the British squadron under the walls of Nanjing, saluting the peace treaty, in a painting by Rundle Burges Watson
HMS Cornwallis and the British squadron under the walls of Nanjing, saluting the peace treaty, in a painting by Rundle Burges Watson
Image creditRundle Burges Watson · Public domainResized and cropped for display.

The Treaty of Nanking ends the First Opium War

In the 1830s British merchants were smuggling ever larger amounts of Indian opium into China, paid for in silver. When the imperial commissioner Lin Zexu seized and destroyed their stocks at Canton in 1839, Britain sent warships. Steam gunboats and modern guns overwhelmed the Qing forces along the coast, and in the summer of 1842 a British fleet sailed up the Yangtze, cut the Grand Canal that fed Beijing and anchored before the walls of Nanjing.

With the old southern capital at its mercy, the Qing court gave way. On 29 August 1842, aboard the British flagship HMS Cornwallis, the British envoy Sir Henry Pottinger and the imperial commissioners Qiying and Yilibu signed the Treaty of Nanking. China ceded Hong Kong Island to Britain, opened five ports to British trade and residence, ended the Canton merchants’ monopoly and agreed to pay a heavy indemnity. It was the first of the ‘unequal treaties’ that Chinese historians count as the start of a century of humiliation.

Read the full storyHistory & Timeline →Source: USC US-China Institute: Treaty of Nanjing (Nanking), 1842 ↗
A 16th-century Ottoman miniature of the Battle of Mohács, now displayed at Szigetvár Castle in Hungary
A 16th-century Ottoman miniature of the Battle of Mohács, now displayed at Szigetvár Castle in Hungary
Image creditUnknown · Public domainResized and cropped for display.

Süleyman the Magnificent crushes the Hungarian army at Mohács

Five years after taking Belgrade, the Ottoman sultan Süleyman the Magnificent marched north again in 1526 with a large army and some 300 cannon. Hungary was ill prepared to meet him: its king, Louis II, was only twenty, its nobles were quarrelling, and help from the rest of Christian Europe never came. Louis gathered what troops he could and chose to fight on the open plain near Mohács, beside the Danube.

On 29 August 1526 the Hungarian knights charged, but they were cut down by Ottoman artillery and the musket fire of the Janissaries, and within a few hours the army was destroyed. Louis was killed as he fled, falling from his horse or drowning in a swollen stream. His death ended the Jagiellonian line in Hungary and Bohemia, whose crowns passed to the Habsburgs. Hungary was split for a century and a half between Habsburg and Ottoman rule, with Transylvania in between.

Read the full storyHistory & Timeline →Source: Britannica: Battle of Mohács (1526) ↗
A full-size mock-up of RDS-1, the first Soviet atomic bomb, at the Polytechnical Museum in Moscow, photographed in 2025
A full-size mock-up of RDS-1, the first Soviet atomic bomb, at the Polytechnical Museum in Moscow, photographed in 2025
Image creditAleksandr Sigachyov · CC0Resized and cropped for display.

The Soviet Union tests its first atomic bomb

After the atomic bombings of Hiroshima and Nagasaki in 1945, Stalin ordered his scientists to build a bomb of their own as fast as possible. The physicist Igor Kurchatov led the work, with the secret police chief Lavrentiy Beria in overall charge, and the project was helped by detailed information passed on by spies inside the American Manhattan Project. The design, a plutonium bomb, closely followed the American ‘Fat Man’.

On 29 August 1949 the device, known as RDS-1, was exploded on a tower on the steppe of the Semipalatinsk test site in Soviet Kazakhstan, with a yield of about 22 kilotons. American aircraft picked up radioactive traces, and on 23 September President Truman told the world that the US monopoly had ended years sooner than expected. The nuclear arms race had begun. The Soviet Union carried out 456 nuclear tests at Semipalatinsk, with lasting harm to the people who lived nearby.

Read the full storyHistory & Timeline →Source: CTBTO: 29 August 1949, first Soviet nuclear test ↗
The title page of a printed edition of the treaty of 29 August 1825 between the Emperor of Brazil and the King of Portugal, published in London
The title page of a printed edition of the treaty of 29 August 1825 between the Emperor of Brazil and the King of Portugal, published in London
Image creditImpério do Brasil e o Reino de Portugal · Public domainResized and cropped for display.

Portugal recognises Brazil’s independence

When Napoleon invaded Portugal in 1807 the Portuguese royal family fled to Rio de Janeiro, and for thirteen years Brazil was the heart of the empire. After King João VI went home to Lisbon in 1821, the Portuguese parliament tried to put Brazil back in its old colonial place. His son and heir Pedro, left behind as regent, refused, and in September 1822 he declared Brazil independent and was soon crowned its emperor. Portugal would not accept the loss, and fighting followed in several provinces.

Britain, which traded heavily with both countries, brokered a settlement, and its envoy Sir Charles Stuart went to Rio to negotiate on Portugal’s behalf. On 29 August 1825 the Treaty of Peace and Alliance was signed there: Portugal recognised Brazil as an independent empire with Pedro I as its sovereign, while João VI kept the honorary title of emperor. In a separate agreement Brazil took on a payment of two million pounds to Portugal, money largely borrowed in London.

Read the full storyHistory & Timeline →Source: Ministry of Foreign Affairs of Brazil, Concórdia treaty database: Treaty of Peace and Alliance between Brazil and Portugal, 1825 ↗
Louis XI and Edward IV meet on the bridge at Picquigny, talking through a wooden grille, in an illustration by Job from an early 20th-century French history book
Louis XI and Edward IV meet on the bridge at Picquigny, talking through a wooden grille, in an illustration by Job from an early 20th-century French history book
Image creditJacques Marie Gaston Onfroy de Bréville · Public domainResized and cropped for display.

Two kings meet on a bridge at Picquigny

In the summer of 1475 Edward IV of England landed at Calais with one of the largest English armies ever sent to France, planning to renew the Hundred Years’ War with his ally the Duke of Burgundy. But the Burgundian help never arrived in strength, and King Louis XI of France, who preferred buying peace to fighting for it, offered terms. The two armies faced each other across the Somme.

On 29 August 1475 the two kings met at Picquigny, near Amiens, on a bridge built over the river for the occasion, with a wooden grille between them in case of treachery. They agreed a seven-year truce. Edward went home with 75,000 crowns and the promise of a pension of 50,000 a year, and his daughter was promised to the French heir. No final peace was ever signed, but the meeting at Picquigny is often taken as the real end of the Hundred Years’ War.

Read the full storyHistory & Timeline →Source: Britannica: How did the Hundred Years’ War end? ↗
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PEOPLE

Born Today

Jean-Baptiste Colbert
Image creditPhilippe de Champaigne · Public domainResized and cropped for display.

Jean-Baptiste Colbert

French statesman who, as Louis XIV’s chief minister for finance, built up France’s industry, trade and navy.

Oliver Wendell Holmes Sr.
Image creditArmstrong & Co., Boston · Public domainResized and cropped for display.

Oliver Wendell Holmes Sr.

American physician, poet and essayist, author of ‘Old Ironsides’ and The Autocrat of the Breakfast-Table.

Maurice Maeterlinck
Image creditUnknown · Public domainResized and cropped for display.

Maurice Maeterlinck

Belgian playwright whose dreamlike plays, among them Pelléas and Mélisande and The Blue Bird, won him the 1911 Nobel Prize in Literature.

Andrew Fisher
Image creditNational Library of Australia · Public domainResized and cropped for display.

Andrew Fisher

Scottish-born former coal miner who was Labor prime minister of Australia three times between 1908 and 1915.

Kim Ku
Image creditUnknown · Public domainResized and cropped for display.

Kim Ku

Korean independence leader who headed the Korean Provisional Government in exile and was assassinated in Seoul in 1949.

Ingrid Bergman
Image creditWhitey Schafer · Public domainResized and cropped for display.

Ingrid Bergman

Swedish actress, the star of Casablanca and winner of three Academy Awards, who died on her 67th birthday in 1982.

Bob Beamon
Image creditChell Hill · CC BY-SA 3.0Resized and cropped for display.

Bob Beamon

American long jumper whose leap of 8.90 metres at the 1968 Mexico City Olympics stood as the world record for almost 23 years.

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IDEAS THAT CHANGED THINGS

Firsts, Science & Discoveries

A drawing of Faraday's induction ring, two coils of wire wound on opposite sides of an iron ring, published in 1896
A drawing of Faraday’s induction ring, two coils of wire wound on opposite sides of an iron ring, published in 1896
Image creditUnknown · Public domainResized and cropped for display.

Michael Faraday discovers electromagnetic induction

In 1820 the Danish scientist Hans Christian Ørsted showed that an electric current produces magnetism. Many people then wondered whether magnetism could produce electricity, and at the Royal Institution in London Michael Faraday, the son of a blacksmith who had started his career as a laboratory assistant, returned to the question again and again. In the summer of 1831 he had an iron ring made and wound two separate coils of copper wire around opposite sides of it.

On 29 August 1831, as his laboratory notebook records, he connected one coil to a battery and the other to a wire laid over a compass needle. Each time he made or broke the battery connection, the needle jumped: a current had been induced in the second coil, though the two were not connected. Faraday had discovered electromagnetic induction, and his ring was the first transformer. Within weeks he had also made electricity by moving a magnet, the principle behind every generator in today’s power stations.

Read the full storyHistory & Timeline →Source: Royal Institution: Michael Faraday’s ring-coil apparatus ↗
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SPORTING HISTORY

Sporting Moments

A plaque in Leeds put up for rugby league's 120th anniversary, marking where Leeds played their first home game under the new Northern Union rules in September 1895
A plaque in Leeds put up for rugby league’s 120th anniversary, marking where Leeds played their first home game under the new Northern Union rules in September 1895
Image creditKeith Seabridge · CC BY-SA 2.0Resized and cropped for display.

Northern clubs break away to found rugby league

By the 1890s rugby was hugely popular in the industrial towns of Yorkshire and Lancashire, where many players were mill hands and miners who lost a day’s pay whenever they travelled to a Saturday match. The northern clubs wanted to compensate them for this ‘broken time’, but the Rugby Football Union, run largely by southern gentlemen who held to strict amateurism, refused.

On 29 August 1895 representatives of 22 clubs met at the George Hotel in Huddersfield, and all but one voted to leave the Rugby Football Union and form a Northern Rugby Football Union that would allow broken-time payments. Within a few years the new body went fully professional and changed its rules, cutting teams from 15 to 13 players. In 1922 it took the name Rugby Football League, and the game it created is now played from England to Australia, New Zealand and the Pacific islands.

Read the full storyHistory & Timeline →Source: Rugby Football League: One night in Huddersfield, how rugby league was born ↗
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MUSIC • FILM • BOOKS • CULTURE

Culture Stories

The cover of the Edition Peters score of John Cage's 4'33"
The cover of the Edition Peters score of John Cage’s 4’33”
Image creditJohn Cage · Public domainResized and cropped for display.

A pianist plays nothing: John Cage’s 4’33” is first performed

The American composer John Cage had long been drawn to the idea of a piece made of silence. A visit to a soundproof room at Harvard, where he still heard the sounds of his own body, convinced him that true silence did not exist, and the white paintings of his friend Robert Rauschenberg gave him the courage to try. The result was a work in three movements in which the performer plays no notes at all.

On 29 August 1952 the pianist David Tudor gave the first performance at the Maverick Concert Hall, a timber hall in the woods near Woodstock, New York, at a benefit recital of new music. He sat at the piano, closed the lid, opened it between movements and turned the pages of the score while watching a stopwatch. The audience heard the wind in the trees, then rain on the roof, then their own murmurs, and some walked out. Cage later said that it was his most important work.

Read the full storyHistory & Timeline →Source: Museum of Modern Art: John Cage, 4’33” (In Proportional Notation) ↗
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LIVES REMEMBERED

Remembered Today

Pope Pius VI
Image creditPompeo Batoni · Public domainResized and cropped for display.

Pope Pius VI

Pope from 1775 whose long reign ended when French revolutionary forces took him prisoner; he died in captivity at Valence.

Tokugawa Iemochi
Image creditTokugawa Mochinaga · Public domainResized and cropped for display.

Tokugawa Iemochi

Fourteenth Tokugawa shogun of Japan, who died at Osaka Castle aged 20 during a failed campaign against the rebel Chōshū domain.

Murad V
Image creditUnknown · Public domainResized and cropped for display.

Murad V

Ottoman sultan who was deposed after only three months in 1876 and spent the rest of his life confined in the Çırağan Palace in Istanbul.

Peter Scott
Image creditArpingstone · Public domainResized and cropped for display.

Peter Scott

British naturalist and painter, son of the Antarctic explorer Robert Falcon Scott, who founded the Slimbridge wetland reserve and helped found the WWF.

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AROUND THE WORLD

Observances & Anniversaries

Craters and boreholes at the former Soviet nuclear test site of Semipalatinsk in Kazakhstan, photographed in 2008
Craters and boreholes at the former Soviet nuclear test site of Semipalatinsk in Kazakhstan, photographed in 2008
Image creditThe Official CTBTO Photostream · CC BY 2.0Resized and cropped for display.

International Day against Nuclear Tests

More than 2,000 nuclear weapons were tested around the world after 1945, in the atmosphere, under the sea and underground, spreading radioactive fallout and leaving lasting harm in places such as the Pacific islands and the steppes of Kazakhstan. The Soviet Union’s main test site, at Semipalatinsk, was closed by decree of Kazakhstan’s government on 29 August 1991, as the Soviet Union broke apart.

At Kazakhstan’s suggestion, the United Nations General Assembly declared 29 August the International Day against Nuclear Tests in December 2009, and it was first marked in 2010. The day is used to call for an end to all nuclear testing and for the Comprehensive Nuclear-Test-Ban Treaty, signed in 1996, to come into force.

Source: United Nations: International Day against Nuclear Tests ↗
HISTORY & TIMELINE

Finished the highlights?

Follow 29 August chronologically, from the Middle Ages to the modern day, with 15 verified events and the sources behind them.

This day through time →