How do the Republican sniper's feelings towards battle evolve throughout the story?

Story is The Sniper by Liam O'Flaherty

There are a lot of changes "The Sniper" goes through throughout the story.

Explanation:

The short story 'The Sniper' by 'Liam O'Flaherty' describes the effects of war on human beings. In the beginning of the story, Sniper is described as thin and young yet 'fanatic'. He is a war-ravaged soldier who is excellent as what he does. He killed the man in the tank and the woman on the roof.

He behaved calmly even in the tense situations. But when he saw the body of his enemy falling, he started disliking the war. He felt awful and shattered knowing that he had killed someone else. Soon he found that the man he killed was his brother, but still he had to leave his brother behind and join his group back in his homeland.