More than likely the drill instructors that you encounter today have served in a combat role or have been deployed in a combat zone. This makes them valuable teachers for future Marines. They can speak intelligently and with experience about the realities of combat. They know firsthand what boot camp training can do to prepare them for the realities of war. They have first-person stories to share with recruits.Sometimes the stories can do more to teach recruits than a classroom lesson can.
Knowing this can help a recruit understand that there is a reason for everything they do in boot camp. The recruit won’t always know the reason. In fact, most of the time he won’t understand. He will just think that he’s being yelled and screamed at and picked on, when in fact the drill instructors are trying to teach him something.
Most of the time, the lesson is staring straight in the recruits face. Literally. A drill instructor who is screaming and teaching recruits to respond to orders by yelling “yes sir” is actually training them to use their loud voice in a time of combat.
That is just one example of why drill instructors do what they do. The point is not to expect to understand their methods. The goal is to obey orders and do what you are told without asking questions. That is what makes the Marine Corps successful. You must learn how to follow orders and obey the chain of command. Leadership is difficult, but so is following orders. There may come a time when an order is given to charge a hill, knowing that the chances that Marines will survive are grim. The Marine Corps needs Marines who are willing to charge that hill without question because they know it is their duty to do so.
This is something that each recruit should seriously consider before even enlisting. If you do not think that you would be able to follow orders without question, you are going to have a hard time in the Marine Corps. Dissension in the ranks is not tolerated. Those recruits who refuse training will be singled out and punished until they conform or are dishonorably discharged. There is no compromise in the Marine Corps. It is literally their way or the highway.
Many recruits get distracted by how mean they perceive the drill instructors to be toward them. This is simply a waste of time and a complete waste of the lesson that is being taught to them. Instead of feeling picked on, recruits need to have the attitude that they don’t need to know why something is happening only that there is a reason for it.
Knowing that these drill instructors most likely have combat experience, recruits should endeavor to learn as much as they can from them. This could be life or death training that one day will save their lives. A lot can be learned from drill instructors if a recruit is willing to listen.
Source: Personal experience