Yes indeed. Even among officers, I have not met too many Marines who use British expressions in everyday coms. That is quite suspicious. Note that a major effort to undermine the war has risen up over the past month, from certain elements in the UK. Over the past month, a number of them have also joined FR.
I agree. This is quite possibly a fake letter originally put about by someone from our erstwhile Allies, who claim to be our friends but don't hesitate to cosy up to our enemies when it suits them.