"You are now a member of the Army of the United States. That Army is made up of free citizens chosen from among a free people. The American people of their own will, and through the men they have elected to represent them in Congress, have determined that the free institutions of this country will continue to exist. They have declared that, if necessary, we will defend our right to live in our own American way and continue to enjoy the benefits and privileges which are granted to the citizens of no other nation. It is upon you, and the many thousands of your comrades now in the military service, that our country has placed its confident faith that this defense will succeed should it ever be challenged. In the transition from civil life to the life of a soldier you may, at first, feel somewhat confused. It is the purpose of this handbook to help you over these rough spots as rapidly as possible and to lay the foundations for your successful career as a soldier. Making good as a soldier is no different from making good in civil life. The rule is the same and that is-know your own job and be ready to step into the job of the man ahead of you. Promotion is going to be very rapid in this Army. Be ready for it. You will have little time to learn the duties of a noncommissioned officer after you become one. You will be expected to know those duties and show that you know them. At a moment's notice you may have to take charge of your squad as a corporal-and in a critical hour. In the same way when you are a sergeant you cannot tell under what conditions and at what hour you may have to take the place of your lieutenant. You want to know what is expected of you and be ready to do it. The things that a trained soldier must know, and the way in which they are done, will be taught you as rapidly as you can absorb them. The basic military information is described and explained in this handbook so that it may be available constantly to you during the first weeks of your service. By mastering the contents your future progress will be much more rapid."