Death by Sanity..Death by Insanity

Jack O'Sullivan, a young Irish recruit trying to survive the trenches of 1917 France, is thrust into a predicament that will test his resolution to live. The soldier faces death at every corner, but where could this death come from? A sniper's bullet? Mustard gas? A wanton shell or a German bayonet? Or is it Jack's own fears and demons that could be his undoing? (This is my very first attempt at a short story or literature altogether. Any feedback or criticism is, therefore, most welcome) .