Events relating to europe
Romania, hoping for territorial gains from Hungary, joins the war on the side of the Allies
Eleven British tanks go into pioneering but ineffective action at the battle of the Somme
Baron von Richthofen, the 'Red Baron', shoots down the first of many Allied aircraft
Bucharest, the capital of Romania, is captured by Austrian and Bulgarian forces
Herbert Asquith resigns in the face of a political coup against him, and is replaced as UK prime minister by Lloyd George
Philippe Pétain becomes a French national hero for his successful defence of Verdun
Prince Georgi Lvov becomes prime minister in Russia's new Provisional Government
Wartime scarcity causes sugar rationing to be imposed in Britain, to be followed soon by meat and butter and related products
The French poet Guillaume Apollinaire is the first to use the term Surrealism
Jeeves and Bertie Wooster make their first appearance in P.G. Wodehouse's The Man with Two Left Feet
John Ireland's Second Violin Concerto meets with immediate approval

Wounded at the front on the Somme, the poet Wilfred Owen is invalided home to Britain
Amedeo Modigliani's first Paris exhibition is immediately closed by the police because it contains paintings of nudes
Parade brings together Massine (choreography), Satie (music), Cocteau (libretto) and Picasso (sets and costumes)
Piet Mondrian and other Dutch artists establish the movement known as De Stijl, together with a magazine of the same name
Eamon de Valera, newly released from prison, is elected to lead Sinn Fein
Manuel de Falla's ballet The Three-Cornered Hat is produced by Diaghilev with choreography by Massine and designs by Picasso
Foreign Secretary A.J. Balfour declares Britain's conditional support for a homeland in Palestine for the Jews
Paul Valéry wins praise for his long symbolic poem La Jeune Parque
Anti-German feeling causes the British royal family to adopt the name Windsor instead of Saxe-Coburg & Gotha
A mutiny by soldiers, in support of Petrograd demonstrators, proves a turning point in Russia's February revolution
Crowds demonstrating in Petrograd are fired on after tsar Nicholas II sanctions the use of force
An uprising in Petrograd brings the Peter and Paul fortress into the hands of the rebels
With his capital city in the hands of rebels, tsar Nicholas II abdicates
The Petrograd Soviet demands drastic reforms in return for supporting the proposed Provisional Government in Russia