Museum pieces include a British heavy field gun, right, and a German howitzer. (Charlie Riedel / Associated Press)
A banner that indicated that two people from a home were serving in the military. (Charlie Riedel / Associated Press)
A visitor passes a display. (Charlie Riedel / Associated Press)
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A reproduction of a London newspaper front page from 1914, which writes about the assassination of Archduke Franz Ferdinand. (Charlie Riedel / Associated Press)