
Siegfried Sassoon 8/9/1886 – 1/9/1967
Sassoon sent a protest poem.
I will not print it:
impeding recruitment
is not in our remit.

I can’t find the original article which inspired this poem, but I found some contextual information on Wikipedia:
War opposition and Craiglockhart
Despite his decorations and reputation, in 1917 Sassoon decided to make a stand against the conduct of the war. One of the reasons for his violent anti-war feeling was the death of his friend David Cuthbert Thomas, who appears as “Dick Tiltwood” in the Sherston trilogy. Sassoon would spend years trying to overcome his grief.
[…]
At the end of a spell of convalescent leave, Sassoon declined to return to duty; instead, encouraged by pacifist friends such as Bertrand Russell and Lady Ottoline Morrell, he sent a letter to his commanding officer entitled Finished with the War: A Soldier’s Declaration. Forwarded to the press and read out in the House of Commons by a sympathetic member of Parliament, the letter was seen by some as treasonous (“I am making this statement as an act of wilful defiance of military authority”) or at best as condemning the war government’s motives (“I believe that the war upon which I entered as a war of defence and liberation has now become a war of aggression and conquest”). Rather than court-martial Sassoon, the Under-Secretary of State for War, Ian Macpherson, decided that he was unfit for service and had him sent to Craiglockhart War Hospital near Edinburgh, where he was officially treated for neurasthenia (“shell shock”).