Members of the Women's Fire Brigade with their Chief Officer, March 1916. (Photo by Topical Press Agency)

A German rifleman beside the corpse of a French soldier in a trench at Fort Vaux, France, 1916. (Photo by Hulton Archive/Getty Images)

An undated archive picture shows a dog pulling a Belgian machine gun at an unknown location in northern France. A Viscount in the Armoured Cavalry Branch of the French Army left behind a collection of hundreds of glass plates taken during World War One (WWI) that have never before been published. The images, by an unknown photographer, show the daily life of soldiers in the trenches, destruction of towns and military leaders. The year 2014 marks the 100th anniversary of the start of WWI. (Photo by Collection Odette Carrez/Reuters)

A fireman from the London Fire Brigade, wearing a smoke helmet. (Photo by Topical Press Agency/Getty Images). Circa 1908

Street fighting in Berlin between Government troops and Spartacists, during the Spartacist uprising which followed Germany's defeat in World War I. (Photo by Keystone/Getty Images). 1919

Clutching a large paper bag and shading his eyes as he peers ahead, comic actor of the silent screen, Buster Keaton (1885–1966) arriving at Paris airport. (Photo by Keystone/Getty Images). 1st August 1947

A group of Ashkenazi jews in Jerusalem. (Photo by Hulton Archive/Getty Images). Circa 1885

“José Doroteo Arango Arámbula (5 June 1878 – 20 July 1923) – better known by his pseudonym Francisco Villa or its hypocorism Pancho Villa – was one of the most prominent Mexican Revolutionary generals”. – Wikipedia

Photo: Mexican rebel leader Francisco “Pancho” Villa with one of the motorcycles used in the Battle of Torrero. (Photo by Topical Press Agency/Getty Images). August 1914