Answer:
Hemingway’s belief that a hero should exhibit grace under pressure.
Step-by-step explanation:
This is the best description of Hemingway's belief when it came to heroes. In this passage, we learn that the major, two officers and the protagonist are having a drink. The tone that the story conveys is one of relaxation and calm. This contrasts with the fact that the men are going to carry out an attack later. The contrast is important, as it shows the protagonist's character. He seems able to remain gracious and calm even under great pressure.