History reenactors wearing World War I German military uniforms stand at attention as man riding a World War I-era motorcycle drives past at their campsite prior to a parade on May 27, 2016 in Verdun, France. The governments of France and Germany will commemorate the 100th anniversary of the World War I Battle of Verdun with ceremonies this coming Sunday. Approximately 300,000 soldiers lost their lives in the 10-month campaign that was among the most grueling battles of World War I.