They will also rejoice in the popularity of their teacher, already highly regarded in the eyes of his profession on account of his presentation of conclusions, the truth of which grows with years. His work merits widespread attention. It would be an error to leave it in the exclusive possession of special writers and military technicians. In language which is equal in power and pathetic beauty, it should carry its light much further and address itself to all readers who enjoy solid thought. Their ideas broadened, they will, without fail, join those already initiated. No one can glance over these pages with indifference. No one can fail to be moved by the strong and substantial intellect they reveal. No one can fail to feel their profound depths. To facilitate treatment of a subject which presents certain difficulties, we shall confine ourselves to a succinct explanation of its essential elements, the general conception that unites them, and the purpose of the author. But we must not forget the dramatic mutilation of the work unfortunately never completed because of the glorious death of Ardant du Picq. When Colonel Ardant du Picq was killed near Metz in 1870 by a Prussian shell, he left works that divide themselves into two well-defined categories: (1) Completed works: Pamphlet (printed in 1868 but not intended for sale), which forms the first part of the present edition: Ancient Battle. A series of memoirs and studies written in 1865. These are partly reproduced in Appendices I and II herein. (2) Notes jotted down on paper, sometimes developed into complete chapters not requiring additions or revision, but sometimes abridged and drawn up in haste. They reveal a brain completely filled with its subject, perpetually working, noting a trait in a rapid phrase, in a vibrating paragraph, in observations and recollections that a future revision was to compile, unite and complete. The collection of these notes forms the second part: Modern Battle. These notes were inspired by certain studies or memoirs which are presented in Appendices I-V, and a Study on Combat, with which the Colonel was occupied, and of which we gave a sketch at the end of the pamphlet of 1868. He himself started research among the officers of his acquaintance, superiors, equals or subordinates, who had served in war. This occupied a great part of his life.