At the outbreak of World War I, de Langle de Cary was given command of the Fourth Army, together with Pierre Ruffey and his Third Army, he was ordered to attack the Ardennes.
De Langle de Cary was given command of the Fourth Army with Pierre Ruffey. This was what he was ordered to attack the Ardennes. This was at the outbreak of World War I. This was together. De Langle de Cary was given command of the Fourth Army with his Third Army. This was what he was ordered to attack the Ardennes. This was at the outbreak of World War I. This was together.