The present work is designed to impart information to Military Students. I submit it to their attention, and trust they will make allowances for its defects.<br><br>There are many reasons why an officer should know something on tactics, of the three departments of an army, even though he may never have the supreme command, he may often be called on to give his opinion on the merits of plans of operations. This alone should make it a duty, that an officer should be thoroughly acquainted with this part of military science.