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| Crowds, many waving boaters, cheer Britain's declaration of war on Germany in Trafalgar Square, London. (Photo by Hulton Archive/Getty Images) |
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| Police in Sarajevo arrest a man after a failed assassination attempt on the life of Archduke Franz Ferdinand, heir to the throne of the Austro-Hungarian Empire. The arrested man previously thought to be Gavrilo Princip, who succeeded in killing the Archduke the same day, is now thought to be one of his six co-conspirators Nedeljko Cabrinovic. The assassination was one of the causes of World War I. The moment was captured by amateur photographer Milos Oberajger. (Photo by Milos Oberajger/Topical Press Agency/Getty Images) |
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| Exuberance on Unter den Linden in Berlin, following the declaration of war, 4th August 1914. A photograph of Kaiser Wilhelm II is visible in the background. (Photo by General Photographic Agency/Hulton Archive/Getty Images) |
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| Russian soldiers stoping a lorryload of deserters. (Photo by Hulton Archive/Getty Images) |
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| Russian soldiers outside a marconi wireless station. (Photo by Topical Press Agency/Getty Images) |
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| Mobilized Austrian troops and officers bid farewell to their wives and sweethearts. (Photo by Hulton Archive/Getty Images) |
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| Belgian soldiers driving a Minerva armoured car during the First World War. (Photo by Hulton Archive/Getty Images) |
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| A recruitment drive during the First World War at Trafalgar Square, London. (Photo by Central Press/Getty Images) |
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| Two men conscripted to the British Army undergoing a medical check-up at Marylebone Grammar School, London. (Photo by Central Press/Getty Images) |
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| French officers dining in style in a trench near the front line. (Photo by Hulton Archive/Getty Images) |
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| Two army deserters are threatened by a Russian soldier with raised rifle and bayonet. (Photo by Hulton Archive/Getty Images) |
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| British tommies relaxing and having wounds treated in an underground forward dressing station by the Menin Road in France. (Photo by Three Lions/Getty Images) |
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| German sharpshooters move to a position near the front line, during the fighting near the Aisne River, 1914. (Photo by Keystone/Getty Images) |
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| Injured soldiers rest in a cave in France. (Photo by Hulton Archive/Getty Images) |
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| Wounded British and Belgium soldiers retreating from Mons during World War I. (Photo by Three Lions/Getty Images) |
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| British soldiers, newly arrived in France preparing to go to the lines. (Photo by Three Lions/Getty Images) |
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| French troops waiting to depart for the Belgian front. (Photo by Three Lions/Getty Images) |
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| German infantry on manoeuvres in preparation for war. (Photo by Topical Press Agency/Getty Images) |
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| Members of the 15th London Regiment receive their pay outside Somerset House, soon after mobilisation. (Photo by Hulton Archive/Getty Images) |
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| German reservists going home to say goodbye to their families, before leaving to go to the front. The children with them are wearing their father's helmets. (Photo by Hulton Archive/Getty Images) |
