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"): At the Battle of Omdurman (2 September 1898), an army commanded by the British General Sir Herbert Kitchener defeated the army of Abdullah al-Taashi, the successor to the self-proclaimed Mahdi, Muhammad Ahmad.
Relevant evidence: No