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.

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.

In April 1917, Lenin published the April Theses, the strategy of the October Revolution, which proposed that the Russian revolution was not an isolated national event, but a fundamentally international event — the first world socialist revolution.

* 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.

In April 1834, Johnston took up farming in Texas, but enlisted as a private in the Texas Army during the Texas War of Independence against the Republic of Mexico in 1836.

His successor President Barack Obama has expressed his desire to recognize the Armenian Genocide during the electoral campaigns, but after being elected, has not used the word genocide in his first annual April 24 speech in 2009.

Following a burglary, a murder, and two attempted murders in Adelaide during March 1838, Governor Hindmarsh created the South Australian Police Force ( now named South Australia Police ) in April 1838 under 21-year-old Henry Inman.

Alexios V Doukas, surnamed Mourtzouphlos (, d. December 1205, Constantinople ) was Byzantine Emperor ( 5 February – 12 April 1204 ) during the second and final siege of Constantinople by the participants of the Fourth Crusade.

In January 1972, three months before the planned April launch date, a fuel tank in the Command Module was accidentally damaged during a routine test.

The Thai zodiac includes a Naga in place of the Dragon and begins, not at Chinese New Year, but at either on the first day of fifth month in Thai lunar calendar, or during the Songkran festival ( now celebrated every 13 – 15 April ), depending on the purpose of the use.

The star culminates at midnight on about 30 April, being visible during the northern spring or the southern autumn.

Antares B can be observed with a small telescope for a few seconds during lunar occultations while Antares itself is hidden by the Moon ; it was discovered by Johann Tobias Bürg during one such occultation on April 13, 1819.

The city is home to the Atlanta Dogwood Festival, an annual arts and crafts festival held one weekend during early April, when the native dogwoods are in bloom.

Travelling in remote areas in northern Australia is not advisable during the wet season ( November to April ), as heavy tropical downpours can quickly make dirt roads impassable.

In spring, the Gulf of Finland and the Gulf of Bothnia normally thaw during in late April, with some ice ridges persisting until May in the eastern extremities of the Gulf of Finland.

A Beltane Fire Festival has been held every year since 1988 during the night of 30 April on Calton Hill in Edinburgh, Scotland and attended by up to 15, 000 people.

However, Bethlehem is affected also by annual waves of hot, dry, sandy and dust Khamaseen winds from the Arabian Desert, during April, May and mid-June.

Sir Charles Spencer " Charlie " Chaplin, KBE ( 16 April 188925 December 1977 ) was an English comic actor, film director and composer best known for his work during the silent film era.

As a consequence on April 13, 1975, several units of N ' Djamena's gendarmerie killed Tombalbaye during a coup.

A United Nations plan sponsored by Secretary-General Kofi Annan was announced on 31 March 2004, based on what progress had been made during the talks in Switzerland and fleshed out by the UN, was put for the first time to civilians on both sides in separate referendums on 24 April 2004.

By 1974, another challenge to the state's authority and legitimacy had come from 19 April Movement ( M-19 ), a mostly urban guerrilla group founded allegedly in response to an electoral fraud during the final National Front election of Misael Pastrana ( 1970 – 1974 ) and the defeat of former dictator Gustavo Rojas.

cyclones possible during rainy season ( December to April ); Le Kartala on Grande Comore is an active volcano

Wind storms can be frequent, bringing Saharan dust into the city during the months of March and April.

In April 2010 during Admiral Mike Mullen's address at Columbia, President Lee C. Bollinger stated that the ROTC would be readmitted to campus if the admiral's plans for revoking the don't ask, don't tell policy were successful.

An incident also occurred in April 2007 in the Chicago Loop district, where a coyote, later nicknamed " Adrian ", quietly entered a Quizno's restaurant during the lunch hours ; it was later captured and released at a wildlife rehabilitation center near Barrington, Illinois.

The U. S. Army's last horse cavalry actions were fought during World War II: a ) by the 26th Cavalry Regiment ( PS ) in World War II — a small mounted regiment of Philippine Scouts which fought the Japanese during the retreat down the Bataan peninsula, until it was effectively destroyed by January 1942 ; and b ) on captured German horses by the mounted reconnaissance section of the U. S. 10th Mountain Division in a spearhead pursuit of the German Army across the Po Valley in Italy in April 1945.

Finally, Khrushchev was also reacting in part to the Jupiter intermediate-range ballistic missiles which the United States had installed in Turkey during April 1962.