The infantry is the principal and most important arm, which is charged

with the main work on the field of battle and it usually decides the

final issue of the combat. (Field Service Regulations.) The role (duty

or job) of the infantry, whether offensive or defensive, is the role of

the entire force. If it fails, all fail. When properly supported by

artillery, trained infantrymen armed with rifles, bayonets, and the will

to put the enemy out of action, will settle all issues.