Where territory is occupied in the course of hostilities by an enemy's force, even if the annexation of the occupied country is proclaimed by the enemy, there can be no change of allegiance during the progress of hostilities on the part of a citizen of the occupied country ( R v Vermaak ( 1900 ) 21 NLR 204 ( South Africa )).

A natural-born subject owes allegiance wherever they may be, so that where territory is occupied in the course of hostilities by an enemy's force, even if the annexation of the occupied country is proclaimed by the enemy, there can be no change of allegiance during the progress of hostilities on the part of a citizen of the occupied country ( R v Vermaak ( 1900 ) 21 NLR 204 ( South Africa )).

* 1900 – The Battle of Elands River during the Second Boer War ends after a 13-day siege is lifted by the British.

Carnegie tried to keep this information concealed, but legal document released in 1900, during proceeding with the ex-chairman of Carnegie Steel Henry Clay Frick revealed how favorable the tariffs had been.

Due to the 13-day difference between the calendars between 1900 and 2099, 21 March corresponds, during the 21st century, to 3 April in the Gregorian Calendar.

Inscriptions found at Nippur, where extensive excavations were carried on during 1888 – 1900 by John P Peters and John Henry Haynes, under the auspices of the University of Pennsylvania, show that Enlil was the head of an extensive pantheon.

They adopted a red and white kit during the 1900 – 01 season.

On July 27, 1900, during the Boxer Rebellion in China, Kaiser Wilhelm II of Germany gave the order to act ruthlessly towards the rebels: " Mercy will not be shown, prisoners will not be taken.

Although the term is not documented until 1900, a conjectural etymology for the term is that it originated in 17th century Ireland for Protestant supporters of King William III during the Williamite War.

The Indus Valley Civilization ( IVC ) was a Bronze Age civilization ( 3300 – 1300 BCE ; mature period 2600 – 1900 BCE ) which was centred mostly in the western part of the Indian Subcontinent, considered as early form of Hinduism performed during this civilization.

* 1900 – The Battle of Spion Kop between the forces of the South African Republic and the Orange Free State and British forces during the Second Boer War resulted in a British defeat.

* 1900 – Armies of the Eight-Nation Alliance capture Tientsin during the Boxer Rebellion.

Jerusalem Day marks the 1967 reunification of Jerusalem and The Temple Mount under Jewish rule during the Six-Day War almost 1900 years after the destruction of the Second Temple in Jerusalem.

Jellicoe served as chief of staff to Vice Admiral Sir E. H. Seymour during the Seymour expedition to relieve the legations at Peking in June 1900.

Authors William Strauss and Neil Howe, well known for their generational theory, define the Lost Generation as the cohorts born from 1883 to 1900, who came of age during World War I and the roaring twenties.

The Rooseum Centre for Contemporary Art, founded in 1988 by the Swedish art collector and financier Fredrik Roos and housed in a former power station which had been built in 1900, was one of the foremost centres for contemporary art in Europe during the 1980s and 1990s.

After spending months in a sanatorium during the summer and fall of 1900, Weber and his wife travelled to Italy at the end of the year and did not return to Heidelberg until April 1902.

One of his significant finds during his first journey during 1900 – 1901 was the Taklamakan Desert oasis of Dandan Oilik where he was able to uncover a number of relics.

* 1900 – Battle of Leliefontein, a battle during which the Royal Canadian Dragoons win three Victoria Crosses.

The Phillies sank back to mediocrity during the mid-1950s after the departure of the " Whiz Kids ", their competitive futility culminating in a record that still stands: in 1961, the Phillies lost 23 games in a row ( a record since 1900 ).

* 1900 – Filipino resistance fighters defeat a small American column in the Battle of Pulang Lupa, during the Philippine-American War.

In 1900 the ZAR was annexed by the United Kingdom during the Second Boer War although the official surrender of the territory only took place at the end of the war, on 31 May 1902.

Electronic interception appeared as early as 1900, during the Boer Wars.

The population expanded rapidly during the 19th century, increasing from fewer than 3, 000 people in 1807 to about 84, 000 in 1900.

* 1900 – The Eight-Nation Alliance occupies Beijing, China, in a campaign to end the bloody Boxer Rebellion in China.

The Boxer Rebellion trapped the Hoovers in Tianjin in June 1900.

* 1900 – Boxer Rebellion: Allied Western and Japanese forces capture the Taku Forts in Tianjin, China.

* 1900 – Boxer Rebellion: The Imperial Chinese Army begins a 55-day siege of the Legation Quarter in Beijing, China.

* 1900 – Boxer Rebellion.

* 1900 – Boxer Rebellion: The Governor of Shanxi province in North China orders the execution of 45 foreign Christian missionaries and local church members, including children.

His contributions included the adoption of an Open Door Policy in China ( announced on January 2, 1900 ) which may have been a contributing factor in the Boxer Rebellion, and the preparations for the Panama Canal.

Following the Boxer rebellion in China and the Boer War, a second navy bill was passed on 14 June 1900.

She found herself billed between Charlton Heston and David Niven in the epic 55 Days at Peking in 1963, a lavish version of the Chinese revolt against foreign control during the Boxer Rebellion in 1900.

During the Boxer Rebellion, Imperial Chinese forces deployed a weapon called " electric mines " on June 15, at the Peiho river before the Battle of Dagu Forts ( 1900 ), to prevent the western Eight-Nation Alliance from sending ships to attack.

In June 1900 in Beijing, Boxer fighters threatened foreigners and forced them to seek refuge in the Legation Quarter.

In Spring 1900, the Boxer movement spread rapidly north from Shandong into the countryside near Beijing.

The Chinese army and Boxer irregulars besieged the Legation Quarter from 20 June to 14 August 1900.

In 1900 Empress Dowager Cixi fled from the Forbidden City during the Boxer Rebellion, leaving it to be occupied by forces of the treaty powers until the following year.

In 1900, during the Boxer Rebellion, the Eight Nation Alliance occupied the temple complex and turned it into the force's temporary command in Beijing, which lasted for one year.

In 1900, Spike killed a Slayer in China during the Boxer Rebellion.

* The library of the Hanlin Academy, containing irreplaceable ancient Chinese manuscripts, was mostly destroyed in 1900 during the Boxer Rebellion.

The new mass media promoted jingoism in the Spanish-American War ( 1898 ), the Second Boer War ( 1899 – 1902 ), and the Boxer Rebellion ( 1900 ).

From the end of the Indian Rebellion of 1857 until the start of the World War I the Gurkha Regiments saw active service in Burma, Afghanistan, the North-East Frontier and the North-West Frontiers of India, Malta ( the Russo-Turkish War, 1877 – 78 ), Cyprus, Malaya, China ( the Boxer Rebellion of 1900 ) and Tibet ( Younghusband's Expedition of 1905 ).

In 1900, Japan and many western countries dispatched forces to China to protect their citizens and Chinese Christians from the Boxer Uprising.

During the Boxer Rebellion, in the summer of 1900, Bowra was evacuated to Japan, along with his mother, older brother Edward, and other women and children of the European community.

During the autumn of 1900 he went to China as part of the international expedition sent to combat the Boxer Rebellion.

The palace complex suffered two major attacks — during the Anglo-French allied invasion of 1860 ( with the Old Summer Palace also ransacked at the same time ), and during the Boxer Rebellion, in an attack by the eight allied powers in 1900.