Give an example of an allusion in the story "The Sniper."

An allusion is a brief reference to a person, place, thing or idea which is of cultural, literary, historical or political importance. In Liam O'Flaherty's short story "The Sniper" the third person narrator mentions the fighting surrounding the "Four Courts" building in Dublin. This is an allusion to governmental buildings which were highly significant in the Battle of Dublin during the Irish Civil War. The Republican army, of which the protagonist sniper was a part, briefly occupied the buildings before being eventually bombed to the point of surrender by the Free State army which had been supplied with "heavy guns" (also referred to in the story) by the British. Though never explicitly stated in the story, the sniper's task was to help protect the area around the Four Courts.