fell on the eve of a battle which not alone gave France over to the
enemy but disclosed a leadership so inapt as to awaken the suspicion
of treason, one is faced by the inevitable interrogation--"Why?"

Yet the answer is simple. The value of the book of Ardant du Picq lies
precisely in the fact that it contains not alone the unmistakable
forecast of the defeat, itself, but a luminous statement of those
fundamental principles, the neglect of which led to Gravelotte and
Sedan.

Napoleon has said that in war the moral element is to all others as
three is to one. Moreover, as du Picq impressively demonstrates, while
all other circumstances change with time, the human element remains
the same, capable of just so much endurance, sacrifice, effort, and no
more. Thus, from Caesar to Foch, the essential factor in war endures
unmodified.

And it is not the value of du Picq's book, as an explanation of the
disasters of 1870, but of the triumphs of 1914-18, which gives it
present and permanent interest. It is not as the forecast of why
Bazaine, a type of all French commanders of the Franco-Prussian War,
will fail, but why Foch, Joffre, Petain will succeed, that the volume
invites reading to-day.

Beyond all else, the arresting circumstances in the fragmentary pages,
perfect in themselves but incomplete in the conception of their
author, is the intellectual and the moral kinship they reveal between
the soldier who fell just before the crowning humiliation of
Gravelotte and the victor of Fere Champenoise, the Yser and the
colossal conflict of 1918 to which historians have already applied the