Florent, a member of French association Le Poilu de la Marne dressed in a vintage army uniform, takes part in a nine-mile walk through the national forest of Verdun, eastern France, on March 29, 2014. Wearing historical uniforms, members of French and German historical associations took part in the walk and attended a ceremony in the village of Bezonvaux, which was wiped out in the fighting. (Photo by Charles Platiau/Reuters)

French, in blue, and German members of World War I historical associations march into a trench near the bunker of Bezonvaux, in the national forest of Verdun. (Photo by Charles Platiau/Reuters)

Franz, a member of a German World War I historical association, stands in front of a heavy artillery bunker during walk through the national forest of Verdun. (Photo by Charles Platiau/Reuters)

Members of German World War One historical association prepare for a walk at the wiped-out village of Bezonvaux, near Verdun, eastern France, March 29, 2014. (Photo by Charles Platiau/Reuters)

Members of a German World War I historical association, front, march past members of French association Le Poilu de la Marne as they leave the village of Bezonvaux. (Photo by Charles Platiau/Reuters)

Members of German World War I historical association stand in front of a bunker at Bezonvaux. (Photo by Charles Platiau/Reuters)

Members of a German World War I historical association sit on the remains of a French long-range cannon at the wiped-out village of Bezonvaux. (Photo by Charles Platiau/Reuters)

French (in blue) and German members of World War One historical associations take part in a 15-km (9-mile) walk through the national forest of Verdun, eastern France, March 29, 2014. (Photo by Charles Platiau/Reuters)

Wolfgang (L), member of World War One historical association “Darstellungsgruppe Suddeutsches Militar 1870-1918” (DSM 18), from Munich, Germany, and Florent, member of French association “Le Poilu de la Marne”, dressed in vintage army uniforms, visit the Bezonvaux bunker in the national forest of Verdun, eastern France, March 29, 2014. Members of French and German historical associations, who gather annually, together visited the battlefield of Verdun in France, the site of a bloody World War One battle that dragged on for around 10 months in 1916, claiming hundreds of thousands of lives and destroying many villages. Wearing historical uniforms, they attended a ceremony in the village of Bezonvaux, which was wiped out in the fighting, and took part in a 15-km (9-mile) walk through the forest of Verdun. The year 2014 marks the 100th anniversary of the start of the First World War (WWI). (Photo by Charles Platiau/Reuters)

A French, left, and a German member of World War I historical associations lay a wreath for soldiers from both sides who were killed near Bezonvaux. (Photo by Charles Platiau/Reuters)