In 1915, she joined the Entente powers and declared war on Austria-Hungary, and later Germany in the subsequent year.

In 1915 she and George Kessler founded the Helen Keller International ( HKI ) organization.

Following the Royal Navy's revenge at the Battle of the Falkland Islands a month later, the only surviving German cruiser, SMS Dresden, was finally hunted down and cornered at Más a Tierra early in 1915, where she was scuttled after a brief battle with British cruisers.

* 1915 – Typhoid Mary, the first healthy carrier of disease ever identified in the United States, is put in quarantine, where she would remain for the rest of her life.

Some countries in northwestern Europe had more liberal policies towards contraception than the United States at the time, and when Sanger visited a Dutch birth control clinic in 1915, she learned about diaphragms and became convinced that they were a more effective means of contraception than the suppositories and douches that she had been distributing back in the United States.

Instead, since her immediate family had relocated to New England by this time, she attended Brown University and earned a Ph. D in 1915, having written a second dissertation on efficient teaching methods called " Some Aspects of Eliminating Waste in Teaching ".

By 1915, gangrene had set in and her entire right leg was amputated ; she was required to use a wheelchair for several months.

She carried out a successful tour of America in 1915, and on returning to France she played in her own productions almost continuously until her death.

Wallis Warfield in about 1915 when she lived in Baltimore

With money acquired from the sale of Stein's last Matisse Woman with a Hat to her brother Michael, she and Toklas vacationed in Spain from May 1915, through the spring of 1916.

Tatiana was also fond of an officer named Vladimir Kiknadze, whom she cared for when he was wounded in 1915 and again in 1916, according to the diary of Valentina Ivanovna Chebotareva, a nurse who worked with Tatiana during the war.

On 11 October 1915, the Bulgarian army attacked Serbia after signing a treaty with Austria-Hungary and Germany stating that Bulgaria would gain the territory she sought at the expense of Serbia.

Irina's first cousin, Grand Duchess Olga Nikolaevna of Russia, whom she had been close to when they were girls, was disdainful of Felix: " Felix is a ' downright civilian ,' dressed all in brown, walked to and fro about the room, searching in some bookcases with magazines and virtually doing nothing ; an utterly unpleasant impression he makes – a man idling in such times ," Olga wrote to her father, Tsar Nicholas II, on 5 March 1915 after paying a visit to the Yusupovs.

In 1912, Asquith fell in love with Venetia Stanley, and his romantic obsession with her continued into 1915, when she married Edwin Montagu, a Liberal Cabinet Minister ; a volume of Asquith's letters to Venetia, often written during Cabinet meetings and describing political business in some detail, has been published ; but it is not known whether or not their relationship was sexually consummated.

Upon graduating in 1915, Larsen went South to work at the Tuskegee Institute in Tuskegee, Alabama, where she became head nurse at its hospital and training school.

Born in Los Angeles, California, she started her Hollywood career as a ' patcher ', editing films by D. W. Griffith, around 1915.

Although useful in its own right, the version of her theorem just given was a special case of the general version she derived in 1915.

The eldest daughter of a jeweler, Jolie ( died 1 April 1997 ), and a soldier, Vilmos Gábor ( 1884-1962 ), she was born in 1915 in Budapest.

Woolf and her husband, Leonard, who had recently set up Hogarth Press, approached her for a story, and Mansfield presented " Prelude ", which she had begun writing in 1915 as The Aloe.

In 1952 she divorced her first husband, film producer Sir Anthony Havelock-Allan ( 1904 – 2003 ), and married MP John Profumo ( 1915 – 2006 ) in 1954, giving up acting shortly afterwards.

Because many of her artist acquaintances frequently had little or nothing to eat, in 1915, she opened the canteen that provided a full meal and a glass of wine for only a few centimes.

In 1915, she appeared in her first motion picture.

In 1915, after the SPD supported German involvement in World War I, she and Karl Liebknecht co-founded the anti-war Spartakusbund ( Spartacist League ) which eventually became the Communist Party of Germany ( KPD ).

Italy reneges on her alliance with the Central Powers ( she joined the Allies in 1915 ) but Turkey joins them instead.

The contract to build the tunnels was won by John Mowlem and Co. Construction of the tunnels started in February 1915 from a series of shafts.

After 1915, when Albert Einstein published the theory of gravity ( general relativity ), the search for a unified field theory combining gravity with electromagnetism started again with renewed intensity.

He created the Munsell Color System in 1915 and started his own Munsell Color Company in 1917.

The debate had started in February 1915 when Commander Wegener started to circulate staff papers attacking Tirpitz's leadership as having trapped the High Seas Fleet in a " dead angle in a dead sea ", and suggested an alternative strategy for victory.

Officially owned by the Evergreen House Foundation, an independent entity started by Zuloaga's great friend, philanthropist Alice Warder Garrett ( 1877-1952 ), Evergreen's works include full-length portraits of Mrs. Garrett ( 1915 ; 1934 ); a seated portrait of Ambassador John Work Garrett ( 1872-1942 ); a Spanish landscape ; a painting based on the opera, " Goyescas "; and a landscape of Calatayud ( Spain ).

In the early months of 1915, an enormous typhus outbreak started to wreak havoc across the Kingdom, during which some 150, 000 people are estimated to have died during the worst typhus epidemic in world history.

On April 5, 1915, Johnson lost his title to Jess Willard, a working cowboy from Kansas who started boxing when he was twenty-seven years old.

After Italy's declaration of war on 15 May 1915 the Austro-Hungarian fleet left its harbours the same day and started its assault on the Adriatic coast between Venice and Barletta.

In 1915, Chen started an influential monthly periodical in the French Concession of Shanghai, The Youth Magazine ( 青年雜誌 ), which was later renamed La Jeunesse ( 新青年, literally New Youth ).

The magazine was started by Chen Duxiu on 15 September 1915 in Shanghai.

This started in 1915 as S. Smith & Sons, on the Edgware Road, established to manufacture fuses, instruments and accessories.

Williams started a music publishing business with violinist / bandleader Armand J. Piron in 1915, which by the 1920s was the leading African-American owned music publisher in the country.

The first troop in the county was started in 1915.

Two banks were started around 1915 to 1917 and the other one was started in 1973.

A thriving village sprang up in 1915, when the railroad started construction of its shops ; and five years later in the 1920, Ravenna was incorporated into a 6th Class City by the Estill County Circuit Court.

Laurel Run is the site of a mine fire which started in 1915.

One of the last Painted Churches built in Texas, construction started on June 3, 1913 with the blessing of the cornerstone, and was completed two years later on October 21, 1915.

The E. 5 / 15 Fokker M. 5K / MG Eindecker aircraft of Leutnant Kurt Wintgens, which started the period of the " Fokker Scourge " on July 1, 1915.

Eventually, the Navy adopted his reforms and by 1915 started to reorganize for possible involvement in the World War then underway.

The original Balboa dance is a form of swing dance that started as early as 1915 and gained in popularity in the 1930s and 1940s.

Lomax, born in Austin in 1915, was third of the four children of pioneering folklorist and author John A. Lomax, with whom he started his career by recording songs sung by sharecroppers and prisoners in Texas, Louisiana, and Mississippi.

In 1915, Piron and Williams together started the Piron and Williams Publishing Company, and in their first year of business published Piron's composition, “ I Wish That I Could Shimmy Like My Sister Kate ”, which became his biggest hit.