The students in Military Academy A High School were all busy to prepare for the graduation exams and also the normal final exams. The difference between the normal exams and the graduation exams lies in the degree of danger.
The normal exams would still be conducted within the Military Academy A High School grounds. On the other hand, the graduation exams would be conducted somewhere else where there were real dangers.
It was also because of this that everyone had to be prepared and signed the form to state that if something happened to them, it was not Military Academy A High School's responsibility.
Deaths were possible.
But those who had picked Military Academy A High School in the first place knew this risk and ready to face it.
If they were not ready, they should never become a soldier in the first place.