I know that Sassoon wrote 'A Soldiers' Declaration' to his commanding officer, but I also know that he hoped it would be channelled through to being read in the House of Commons. One must assume that he had some kind of relationship with his CO and had he expected the communication to stop with that person, he would most likely have used personal words like "you", or "we".
I can't help imagining that he would have discussed his intention to write this protest, or at least his feelings about the change in direction from war of liberation to war of conquest with the CO, he must have had some kind of personal relationship with him, whether it was good or bad is unknown to me. The fact that the CO turned a blind eye to it is not necessarily an indication of a bad relationship, it may be that he felt he was protecting Sasson from himself. The medical record shows that the MO held a certain sympathy towards him, he took pains to point out that Sassoon was not a pacificist (not a popular position to hold at the time), only concerned about the way the war was being conducted. Presumably the CO would have held some views about this as well.
Sasson opens with "I am making this statement as an act of wilful defiance" .. to me a statement is something issued when the author wants to make a point, not debate it. He is leaving the debate to the potential reader(s). Asking them to think about what he is saying. His own mind is made up.
Wilful defiance:
Is he quoting something that has been said to him about his attitude? Or was the use of these words a sort of youthful grandstanding. Or a means of drawing attention to his statement? Wilful and defiance are very strong, dramatic words, they are also the sort of thing that might have appeared on a public schoolboy's report.
Suffering, sacrifice and agony are used in relation to the soldiers, I have to question why civilians are not considered here, and wonder whether this was deliberate? Sensibilities were different in those days so maybe not. Today we get figures on numbers of civilian casualties alongside military, were civilian casualties reported during 1914-1918? Suffering, sacrifice and agony are very strong, emotional words, as well as being dramatic.
Deliberately, insincerity, evil, unjust, error, complacence, callous are all directed at the "military authority" in his opening which is a nice side step from directly blaming the Members of the House of Commons, those people he wanted to influence. I noted his ambition was for this staement to reach the Commons and not the Lords....
The 1914-18 war was the first to be the focus of mass-media attention. Should a statement like this be debated in the Commons, it is very likely that it would rapidly be reproduced in the press, thus reaching a far wider audience.
In just 5 short paragraphs he was:
1. Dramatic, drawing attention
2 & 3. Expositional, stating his case
4. Accusing and conciliatory (not protesting the war, but how it is being managed - an ideal banner for a politician in the Opposition to fly).
5. Asking and accusing
So, did he suit his words to his audience? I think so.
He was aiming at House of Commons, which I would suppose to be comprised of representatives of the "Tommies" and middle-ranking officers rather than the higher-ranking officers who would be most likely from the class that either had connections with Members of the House of Lords, or at least aspirations to be connected with them)
There is ammunition there for an ambitious politician trying to make a name for himself to take up the case and gain a great deal of public support from the growing number of families who had been decimated. The language is formal, the case is made quickly and a solution is offered. Any no-brain political hack could make use of this.
The statement is also in the form of a press release, the opening statement is a sub-editor's dream, it is short, it tells a story and it draws the reader in. The use of dramatic and emotional words throughout the text are in keeping with the editorial style of the times, and confirms to an ideal two inches of double column, which is just about the right size to reproduce along with some editorial comment.



