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fourth class

The fourth class [noun] is the freshman class. As a noun, it is two separate words. As an adjective, it is hyphenated.

The fourth-class [adjective] cadet was early to class.

Do not use numerals when referencing.

Fourth-Class System

Refers to the military training and structure of cadet life through which freshmen, or fourth-class cadets, are molded into whole men and women.

The period of indoctrination and training known as Challenge Week begins with the regimental commander announcing, “The Fourth-Class System is now in effect.”

Cadets are also referred to by class year according to academic standing