I remember reading this as part of GCSE English, unfortunately the school system in the UK makes poetry dry and uninspiring. In terms of anti-war poems I prefer "The Box" by Kendrew Lascelles.
I wonder if you can age a person based on them knowing this and whatever the Siegfried Sassoon poem that was covered in order to demonstrate onomatopoeia? I suppose it would depend how long it was (or indeed if it still is) part of the curriculum.