In 'The Sniper', Liam O'Flaherty brings out the futility of war in a series of events. The gruesome fact that the sniper ends up killing his own brother indeed establishes that war is a futile aataempt where one doesn't know who he is fighting against. It is a double-edged sword and a controversial dilemma which surpasses every human emotion and scientific logic.
The Irish civil war that was supposed to be beneficial, opened up several rifts in the Irish society rendering Ireland weak and devastated. People were conpletely famished and emaciated.
Another theme of the story is that wars splits apart more than countries, but families too.