The combat tactics of the arms combined are considered in Field Service Regulations. (350)

[365]. Demands of modern combat upon infantry; complicated maneuvers impracticable; success dependent upon leadership, etc. Modern combat demands the highest order of training, discipline, leadership, and morale on the part of the infantry. Complicated maneuvers are impracticable; efficient leadership and a determination to win by simple and direct methods must be depended upon for success. (351)

[366]. Duties and quality of infantry. The duties of infantry are many and difficult. All infantry must be fit to cope with all conditions that may arise. Modern war requires but one kind of infantry—good infantry. (352)

[367]. Offensive necessary for decisive results; use of ground, fire efficiency, etc.; local success. The infantry must take the offensive to gain decisive results. Both sides are therefore likely to attempt it, though not necessary at the same time or in the same part of a long battle line.

In the local combats which make up the general battle the better endurance, use of ground, fire efficiency, discipline, and training will win. It is the duty of the infantry to win the local successes which enable the commanding general to win the battle. (356)

[368]. Requisites of infantry; trained to bear heaviest burdens; good infantry can defeat vastly superior infantry of poor quality. The infantry must have the tenacity to hold every advantage gained, the individual and collective discipline and skill needed to master the enemy's fire, the determination to close with the enemy in attack, and to meet him with the bayonet in defense. Infantry must be trained to bear the heaviest burdens and losses, both of combat and march.

Good infantry can defeat an enemy greatly superior in numbers, but lacking in training, discipline, leadership, and morale. (354)

[369]. Fixed forms and instructions covering all cases impossible; study and practice necessary; purposes of practical and theoretical instruction. It is impossible to establish fixed forms or to give general instructions that will cover all cases. Officers and noncommissioned officers must be so trained that they can apply suitable means and methods to each case as it arises. Study and practice are necessary to acquire proper facility in this respect. Theoretical instruction can not replace practical instruction; the former supplies correct ideas and gives to practical work an interest, purpose, and definiteness not otherwise obtainable. (355)

[370]. Exercises in extended order to be in nature of combat exercises; all combat exercises to be conducted under assumed tactical situations. After the mechanism of extended order drill has been learned with precision in the company, every exercise should be, as far as practicable, in the nature of a maneuver (combat exercise) against an imaginary, outlined, or represented enemy.

Company extended order drill may be conducted without reference to a tactical situation, but a combat exercise, whatever may be the size of the unit employed, should be conducted under an assumed tactical situation. (356)