"Soon after the publication of the _Orders and Regulations for Field Officers_, a volume describing the duties of Divisional Officers was issued. This volume has also been outgrown, by reason of continued developments in the organisation of the Army rendering further enlargements necessary. "Meanwhile, the ablest and most devoted Officers throughout the world have been contriving, and, with the authority of Headquarters, executing what have seemed the wisest and best methods for attaining the objects we have in view. It now appears to me not only desirable, but absolutely necessary, that these usages should be again examined and classified, and, if found to be in harmony with our principles, corrected, reduced to writing, and then, endorsed by my authority, published for the benefit of The Army throughout the world, and for the advantage also of those who will hereafter be our successors in the responsibility for carrying forward the War. The _Orders and Regulations_ contained in this volume are the result. "It was my intention to make this book a complete Compendium of Regulations for Staff Officers of all Departments in all parts of the world; but it became evident that, owing to the multiplication of the different branches of our operations, and the diversity of the Regulations required by their varied character and conditions, such a volume would have been swollen to most inconvenient dimensions, and I therefore determined to omit everything not applying to the Officers under the command of the British Commissioner. "It must not be inferred from this that the Staff Officers employed at International Headquarters, or of those engaged in the Social Work, do not rank equally with those whose duties are herein described. Further _Orders and Regulations_ required by them, and for Staff Officers in other Territories, will be issued from time to time as needed. The Regulations contained in Part I of this volume are to be carried out as far as possible in all Territories and Departments.