Complex sentence: Edmonds had also accepted the logic of an offensive in Flanders but not that of appointing Gough; if Haig had wanted a step-by-step attack he was wrong to have superseded Plumer.
Split into simpler sentences: Edmonds had also accepted the logic of an offensive in Flanders but not that of appointing Gough. If Haig had wanted a step-by-step attack he was wrong to have superseded Plumer.