Question: What senior British Army officer known for his "scorched earth policy" experienced success in the British effort to re-conquer the sudan?
Sentence (from "Battle of Omdurman"): It was a demonstration of the superiority of a highly disciplined army equipped with modern rifles, machine guns, and artillery over a force twice their size armed with older weapons, and marked the success of British efforts to re-conquer the Sudan.
Relevant evidence: Yes