Yes, everton, Kipling's exact words are "If any question why we died/ Tell them because our fathers lied". He suffered terrible guilt. His own son had such poor eyesight that he was not fit for the army. Kipling used his great influence, at the highest level, to have his son enlisted. The boy was killed in action in 1915, just weeks after his 18th birthday. But for his father's pleas, the boy wouldn't never have been there. The poem was. of course, written after the death, together with others in similar vein.
Surely there has never been a war with greater casualties, greater consequences and greater lack of reason for being,all at once, than the Great War.