Following the War, many soldiers had become either disabled, shell-shocked (known today as "Post Traumatic Stress Disorder"--PTSD), or both. Although in some countries like Britain, there were rehabilitation centres put in place to help soldiers readjust to post-war life, it was difficult for them to forget the "monstrous anger of the guns", or the rapid stuttering of riles as Wilfred Owne described things in "Anthem for the Doomed Youth" (Lines 2-3). The photo above is a political cartoon from 1914 that depicts a wounded soldier, dragging his entrails behind him as he sits before a well-dressed Capitalist, who presents him with a medal. This image is a physical representation of the sheer absurdity that Owen was alluding to in his writings--as if a medal is enough to repay all the soldiers who gave their lives (and sanity) for their country.
Sources:
https://commons.wikimedia.org/wiki/File:After_the_war_a_medal_and_maybe_a_job2.jpg
https://www.poetryfoundation.org/poems/47393/anthem-for-doomed-youth