What is the inciting incident in The Sniper?

In "The Sniper" by Liam O'Flaherty, the inciting incident occurs when the protagonist, a Republican sniper, is engaged in a tense standoff on a rooftop during the Irish Civil War. He is forced to reveal his position after being shot at by an enemy sniper, leading him to take decisive action to protect himself. This event sets off a chain of violent and dramatic encounters that drive the story forward, ultimately culminating in a shocking revelation.