Military orders are unshakable. In the past, orders issued by superiors in the army had to be carried out by subordinates and could not be disobeyed.
The wine list is like a military order.
Metaphor drinking orders are as strict as military orders and must be implemented.
The officer wrote a military oath that he would be severely punished if he failed to complete the task successfully.
It turned out to be a letter of guarantee written after receiving military orders in operas and old novels, indicating that if you can't complete the task, you are willing to be punished according to military law. Now generally refers to the letter of guarantee written after accepting a major task.