He returned to the Western Front in early 1916 as a general staff officer in the 33rd Division and took part in the Battle of Arras in April / May 1917.

In April 1917, when German U-boats were sinking many British ships with torpedoes, the marine artist Norman Wilkinson devised dazzle camouflage, which paradoxically made ships more visible but harder to target.

A meeting called by Count Plunkett on 19 April 1917 led to the formation of a broad political movement under the banner of Sinn Féin which was formalised at the Sinn Féin Ard Fheis of 25 October 1917.

Among the more than two dozen exhibitors who attended the first meeting held in New York on April 25, 1917, were Frederick Dahnken of the Turner and Dahnken Circuit in San Francisco, Harry O. Schwalbe of Philadelphia, Samuel Roxy Rothafel of New York, Earl H. Hulsey of Dallas and Nathan H. Gordon of Boston.

In April 1917, during a brief period of German aerial supremacy, a grandstanding Member of Parliament ( upset at the lack of orders for his own aircraft manufacturing firm ) claimed that, on the Western Front, a British pilot's average life expectancy was 93 flying hours, or about three weeks of active service.

To that end, they had arranged for the safe conduct of Lenin and his comrades from exile in Switzerland to Petrograd in April 1917, and financed the Bolshevik party, believing Lenin to be the most powerful weapon they could use against Russia.

Hawks left Cornell in April 1917 when the United States declared war on Germany and entered World War I.

Before Hawks was called for active duty, he took the opportunity to go back to Hollywood and by the end of April 1917 was working on Cecil B. DeMille's The Little American, where he met and befriended the then eighteen-year-old slate boy James Wong Howe.

The United States joined with the Allies in April 1917.

After the United States entered the war in April 1917, President Woodrow Wilson appointed Hoover to head the U. S. Food Administration.

Ieoh Ming Pei ( born April 26, 1917 ), commonly known as I. M. Pei, is a Chinese American architect, often called a master of modern architecture.

Ieoh Ming Pei was born on April 26, 1917 to Tsuyee Pei and Lien Kwun, and the family moved to Hong Kong one year later.

In April 1917, he was arrested again but managed to escape and participate in the July Days demonstrations in Petrograd ( St. Petersburg ) on 16 – 17 July 1917.

Hubbard's father rejoined in the Navy in April 1917, during World War I, while his mother May worked as a clerk for the state government.

December 15, 1859 – April 14, 1917 ) was a Polish doctor, linguist, and the creator of Esperanto, the most successful constructed language designed for international communication.

Zamenhof died in Warsaw on April 14, 1917, and is buried in the Okopowa Street Jewish Cemetery in that city.

* The Tasks of the Proletariat in the Present Revolution ( The " April Theses "), 1917

Mao would publish his first article, " A Study of Physical Culture ", in New Youth in April 1917, in which he instructed all Chinese people to increase their physical strength in order to serve the revolutionary cause.

In January 1917 Newman took up a teaching post at Archbishop Holgate's Grammar School in York, leaving in April 1918.

In April 1922, Mitchell was seeing two men almost daily ; one was Berrien “ Red ” Upshaw, whom she is thought to have met in 1917 at a dance hosted by the parents of one of her friends, and the other, Upshaw's roommate and friend, John R. Marsh, a copy editor from Kentucky who worked for the Associated Press.

As a means to destabilize Russia on the Eastern Front, Germany's High Command allowed Lenin to travel across Germany and German-held territory into Russia in April 1917, anticipating him partaking in revolutionary activity.

Trotsky was so upset by what he saw as a usurpation of his newspaper's name that in April 1913 he wrote a letter to Nikolay Chkheidze, a Menshevik leader, bitterly denouncing Lenin and the Bolsheviks.

In April of that year, Vladimir Lenin arrived in Russia from Switzerland, calling for " All power to the soviets.

In April 1917 Germany allowed Bolshevik leader Vladimir Lenin to return to Russia from his exile in Switzerland, and offered him financial help.

Upon his arrival to Petrograd, Lenin proclaimed his April Theses, that included a call for giving all the power to workers ' and soldiers ' soviets ( councils ), and an immediate withdrawal of Russia from the war.

* Order of Lenin ( USSR, 14 April 1961 )

* April 22 – Vladimir Lenin, Russian revolutionary and first Premier of the Soviet Union ( d. 1924 )

After Lenin's return to Russia on 3 April 1917, Kamenev briefly resisted Lenin's anti-government April Theses, but soon fell in line and supported Lenin until September.

After the Russian monarchy was overthrown during the February Revolution, he returned to Russia in April 1917 in a sealed train with Lenin and other revolutionaries opposed to the war.

This was the position, contrary to that of " Classical Marxism " which by that time had been further illuminated by active life, shared by Trotsky and Lenin and the Bolsheviks until 1924 when Joseph Stalin, who along with Kamenev in February 1917 had taken the Menshevik position of first the bourgeois revolution, only to be confronted by Lenin and his famous April Thesis on Lenin's return to Russia, after the death of Lenin and seeking to consolidate his growing bureaucratic control of the Bolshevik Party began to put forward the slogan of " Socialism in one country ".

Before the February 1917 Russian revolution, Lenin had formulated a slogan calling for the ' democratic dictatorship of the proletariat and the peasantry ', but after the February revolution, through his April theses, Lenin instead called for " all power to the Soviets ".

Lenin was met with initial disbelief in April 1917.

It is not surprising, then, that the April theses of Lenin were condemned as Trotskyist.

After Lenin's and Grigory Zinoviev's return to Russia on April 3, Lenin strongly condemned the Provisional Government and unification tendencies in his April Theses.

Kamenev argued against Lenin's position in Pravda editorials, but Lenin prevailed at the April Party conference, at which point Pravda also condemned the Provisional Government as " counter-revolutionary ".

Unbeknownst to Nelson, April 22, 1970, was coincidentally the 100th anniversary of the birth of Vladimir Lenin.

In April 2010, IBM published an announcement about the upcoming 7. 1 release.

In April 2006, researchers from Secure Network and F-Secure published a report that warns of the large number of devices left in a visible state, and issued statistics on the spread of various Bluetooth services and the ease of spread of an eventual Bluetooth worm.

The theory was first published in April 1957 in the letter, " Microscopic theory of superconductivity ".

Widgery's quickly produced report — completed within ten weeks ( 10 April ) and published within eleven ( 19 April )— supported the Army's account of the events of the day.

In a letter published in The Times newspaper on 9 April 1983, Geoffrey Crawley explained the discrepancy by suggesting that the photograph was " an unintended double exposure of fairy cutouts in the grass ", and thus " both ladies can be quite sincere in believing that they each took it ".

The US FDA has approved two Chagas tests, including one approved in April 2010, and has published guidelines that recommend testing of all donated blood and tissue products.

The Victory Garden, that initial ten-page story published in April, 1943 was the first of about 500 stories featuring the Disney ducks Barks would produce for Western Publishing over the next three decades, well into his purported retirement.

First published on April 16, 1989 Dilbert is known for its satirical office humor about a white-collar, micromanaged office featuring the engineer Dilbert as the title character.

It was named # 37 overall among the " 150 Best Games of All Time " by Computer Gaming World Magazine ( 15th Anniversary Issue — November 1996 ), was voted # 13 overall in PC Gamer Magazine's Readers All-Time Top 50 Games Poll ( April 2000 issue ), the editors of PC Gamer ranked it # 12 in the Top 50 Games of all time, in their October 2001 issue, citing the game's humor and pop-culture references and it was ranked # 15 in the 50 Best Games of All Time list published by PC Gamer Magazine in its April 2005 issue.

DOM Level 3, the current release of the DOM specification, published in April 2004, added support for XPath and keyboard event handling, as well as an interface for serializing documents as XML.

( The title is a reference to Lost in the Andes !, a Donald Duck story by Carl Barks, first published in April, 1949.

Scientists at NASA and Penn State University published a paper in April 2011 addressing the question " Would contact with extraterrestrials benefit or harm humanity?

In April 1938, he published the Essentialist's Platform, in which he outlined three major points of essentialism.

As of April 2008, it is published there in 39 languages.

At the arrangement of editor Max Eastman, the American magazine Reader's Digest also published an abridged version in April 1945, enabling The Road to Serfdom to reach a far wider audience than academics.

Keep the Aspidistra Flying was published by Gollancz on 20 April 1936.

An opinion poll conducted by the Georgian weekly Kviris Palitra and published on April 10, 2006 suggested that Salome Zourabichvili would garner 23. 1 % of votes if a presidential election were held today.

* 1965 April – The British Government published a White Paper dealing with the question of Gibraltar and the Treaty of Utrecht.

1654 civilians were killed according to the official Basque figures, but the German sources report a round figure of 300 civilians killed in the bombing, according to the German Bundeswehr Magazine ( published in April 2007, page 94 ).

The results of the Moorfields / UCL trial were published in New England Journal of Medicine in April 2008.

published in April 2010, deals with gene therapy for a form of achromatopsia in dogs.

The first manga was originally serialized in Young Magazine from April 1989 to November 1990 and was followed by a sequel, Man-Machine Interface, from September 1991 to August 1997 ; each series was later published as its own tankōbon volume by Kodansha.

In 1983, Brundtland was invited by then United Nations Secretary-General Javier Pérez de Cuéllar to establish and chair the World Commission on Environment and Development ( WCED ), widely referred to as the Brundtland Commission, developing the broad political concept of sustainable development in the course of extensive public hearings that were distinguished by their inclusiveness and published its report Our Common Future in April 1987.