Verdun

https://en.wikipedia.org/wiki/Verdun
https://en.wikipedia.org/wiki/Battle_of_Verdun
http://www.theglobeandmail.com/news/world/battle-of-verdun-remembered-as-100-year-anniversary-hits/article30198458/
http://www.cbc.ca/news/world/battle-of-verdun-100th-anniversary-1.3605493
http://ww1.canada.com/after-the-war/images-visiting-the-killing-fields-of-verdun-today
http://www.dailymail.co.uk/news/article-3125088/Inside-toxic-grave-longest-battle-history-French-forest-300-000-died-300-days-Battle-Verdun-littered-bodies-arsenic-unexploded-shells-grows-100-years.html
http://www.bbc.com/news/world-europe-36407564
http://www.urbanghostsmedia.com/2013/02/battlefields-then-and-now-verdun-france/