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France's President Francois Hollande, right, stands next to German President Joachim Gauck, left, as they pay respect in the crypt of the the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Sunday, August 3, 2014, to mark the 100th anniversary of the outbreak of World War I. On this day 100-years ago, in 1914, Germany declared war on France, at the beginning of the first global war, which centred on Europe and resulted in over nine million combatants being killed. (AP Photo/Thibault Camus, Pool)

PARIS (AP) — French President Francois Hollande commemorated the 100th anniversary of World War I on Sunday with an appeal to players in the Gaza conflict to put animosities aside — just as France and Germany have done.

In an impassioned speech in Vieil Armand in Alsace, Hollande paid homage to those who lost their lives after Germany declared war on France on Aug. 3, 1914. But he recalled that former enemies France and Germany put aside their differences to pave the way for peace — and that others do the same.

"The history of France and Germany shows that will can always triumph over fatalism and the people who were regarded as hereditary enemies can, in a few years, reconciliate," he said.

France’s President Francois Hollande, second left, and German President Joachim Gauck, second right, pay respect during a ceremony to mark the 100th
France's President Francois Hollande, second left, and German President Joachim Gauck, second right, pay respect during a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Sunday, Aug. 3, 2014. On this day 100-years ago, in 1914, Germany declared war on France, at the beginning of the first global war, which centered on Europe and resulted in over nine million combatants being killed. (AP Photo/Thibault Camus) (Thibault Camus/AP)

He called on the world to take the lasting nature of Franco-German relations as a lesson in peacemaking. He said world powers should seek to impose a cease-fire in Gaza, "to stop the suffering of the civilian population."

German President Joachim Gauck joined the French leader for the ceremony— the first time Germany's head of state has attended.

Soldiers bitterly contested Vieil Armand — known in German as Hartmannswillerkopf — because the summit offered a commanding view of the Rhine Valley. Armies at the time deemed its capture as strategically important and some 30,000 died in fighting.

The cemetery contains the remains of 12,000 unidentified soldiers.


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Hollande also put in place a foundation stone for a museum on the site that will open in in 2017.


France’s President Francois Hollande, left, and German President Joachim Gauck pay respect during a ceremony to mark the 100th anniversary of the
France's President Francois Hollande, left, and German President Joachim Gauck pay respect during a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Sunday, Aug. 3, 2014. On this day 100-years ago, in 1914, Germany declared war on France, at the beginning of the first global war, which centered on Europe and resulted in over nine million combatants being killed. (AP Photo/Thibault Camus) (Thibault Camus/AP)

Men wearing World War I uniforms attend a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of
Men wearing World War I uniforms attend a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Sunday, Aug. 3, 2014. On this day 100-years ago, in 1914, Germany declared war on France, at the beginning of the first global war, which centered on Europe and resulted in over nine million combatants being killed. (AP Photo/Thibault Camus) (Thibault Camus/AP)


France’s President Francois Hollande, right, and German President Joachim Gauck attend a ceremony to mark the 100th anniversary of the outbreak of
France's President Francois Hollande, right, and German President Joachim Gauck attend a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Sunday, August 3, 2014. On this day 100-years ago, in 1914, Germany declared war on France, at the beginning of the first global war, which centred on Europe and resulted in over nine million combatants being killed. (AP Photo/Christian Hartmann, Pool) (Christian Hartmann/AP)