In order to become a drill instructor, an enlisted Marine must go through Drill Instructor School, an intense 12-course taught to prospective Marines.
When a drill instructor begins to train recruits, he or she is usually accompanied by two to three other drill instructors all assigned to one platoon. One platoon generally has approximately 60 to 80 recruits. These drill instructors wear green duty belts combined with a hat called a campaign cover, i.e. smokey bear cover.
Leading the platoon's drill instructors is the Senior Drill Instructor (SDI). The Senior Drill Instructor has already served several cycles, or 12-week periods it takes to train one platoon of recruits. He or she wears a black leather duty belt and the campaign cover.
Drill instructors are the first Marines recruits see when they arrive at Recruit Training and are the Marines that take them the entire way through recruit training up until graduation day. Drill instructors literally are with recruits 24 hours a day.





| E8MC's DI Page | |
| The DI Ribbon | |
| The Duty Hut | |
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| The DI Monument Brick Campaign | |
| Sgt Grit's "Through the Eyes of a Recruit" | |