Government troops at the field kitchen in the main street of Buitrago. (Photo by Ward/Fox Photos/Getty Images)ю 12th September 1936

Members of the Republican militia forming a guard of honour as they carry the coffin of a female militia soldier through the streets of Madrid. (Photo by Ward/Fox Photos/Getty Images). 12th September 1936

Republican soldiers moving up to the front lines in the Guadarrama Mountains during the Spanish Civil War. (Photo by Ward/Fox Photos/Getty Images). 9th September 1936

British refugees arriving at the British Embassy in Madrid, which is guarded by members of the Republican militia, following the outbreak of the Spanish Civil War (Photo by Ward/Fox Photos/Getty Images). 8th September 1936

Spanish National troops sit on a rocky hillside at the French border post of Port Bou Cerbere. (Photo by Three Lions/Getty Images). Circa 1936

Young boys parading in the streets of Irun, Spain in uniforms and with dummy rifles over their shoulders in a parade organised by the nationalists after they had conquered the city during the Spanish Civil War. (Photo by Maeers/Fox Photos/Getty Images). 13th November 1936

A girl in her nationalist, fascist, uniform in the city of San Sebastian. (Photo by Maeers/Fox Photos/Getty Images). 14th November 1936

Fascist youth, both boys and girls, in the rebel uniforms in Irun after the city had been captured by the rebels. (Photo by Maeers/Fox Photos/Getty Images). 13th November 1936

Children wearing nationalist uniform and carrying guns march through a street in San Sebastian, Spain. (Photo by Maeers/Fox Photos/Getty Images). 14th November 1936

Civil Guard with their distinctive hats in San Sebastian during the Spanish civil war. (Photo by Maeers/Fox Photos/Getty Images). 14th November 1936

Mother and father both wearing nationalist uniforms take their baby for a ride in her pram accompanied by grandma in San Sebastian which is controlled by the fascists. (Photo by Maeers/Fox Photos/Getty Images). 14th November 1936

Citizens of Irun, Spain giving the fascist salute at a parade in the city which has been taken over by the nationalist troops in the Spanish Civil war. (Photo by Maeers/Fox Photos/Getty Images). 13th November 1936

Spanish Nationalist troops supporting General Franco during the Spanish Civil War. (Photo by Brown/Fox Photos/Getty Images). 1937

General Franco's Nationalist troops in Spain. (Photo by Brown/Fox Photos/Getty Images). 1937

Three T-26 light tanks made in the Soviet Union travel through a field during a battle in Spain, during the Spanish Civil War. (Photo by Hulton Archive/Getty Images). Circa 1936

A hammer and sickle are painted on a brick wall somewhere in Spain, Spanish Civil War. The caption below reads, 'Viva Rusia' ('Long Live Russia'). (Photo by Hulton Archive/Getty Images). Circa 1936

A crowd of refugees in France during the Spanish Civil War. (Photo by Keystone/Getty Images). 8th April 1938

Male and female militia fighters on the march at the beginning of the Spanish Civil War. (Photo by Keystone/Getty Images). July 1936

Spanish troops at the outbreak of the Spanish Civil War. (Photo by Keystone/Getty Images). 1936

Burned out cars on a street after Franco's Nationalist uprising was defeated in Barcelona at the outset of the Spanish Civil War. The city eventually fell to the Nationalists in 1939. (Photo by Keystone/Getty Images). July 1936

Spanish military dictator General Francisco Franco (1892–1975). (Photo by Hulton Archive/Getty Images). 27th August 1937

Catalonian militiamen in training during the Spanish Civil War. (Photo by Central Press/Getty Images). Circa 1935

New arrivals, still labelled with their name tags on their coats, at a camp for refugees of the Spanish Civil War. (Photo by Keystone/Getty Images). UK, circa 1936

Members of the Irish Brigade arriving at North Wall, Dublin, on their return from fighting in Spain for General Franco's forces during the Spanish Civil War. (Photo by Fox Photos/Getty Images). 22nd June 1937

Soldiers on the nationalist side, led by General Franco, during the Spanish Civil War. They succeeded in overthrowing the republican government. (Photo by Hulton Archive/Getty Images). Circa 1936

A parade in Pamplona of women members of an anti-Government Youth Organisation, Falanga Espanol. (Photo by Central Press/Getty Images). 25th August 1936

Civilians man the barricades in Barcelona, during the civil war. (Photo by Central Press/Getty Images). Circa 1936

Anarchists of the CNT militia receiving their weapons during the Spanish Civil War. (Photo by Fox Photos/Getty Images). Circa 1936