The last engaging book I read on the means and ends of warfare before John Lewis’s was a 2009 abridged version of Winston Churchill’s The River War, originally published in 1899. Its original, full title included An Historical Account of the Reconquest of the Soudan.
The term “reconquest” was misleading, because the Sudan had never before been “conquered” by the British, but was under the jurisdiction of Egypt, then a protectorate of Britain. Egypt was unable to deal militarily with the Dervish forces that meant to conquer it. It fell to Britain extinguish the Mahdist or Islamic threat, which, unchecked, could well have spread from Egypt to the rest of North Africa and the Middle East.
General Herbert Kitchener was tasked with that formidable project. Churchill describes the meticulous and determined campaign he waged, which was not just a matter of sending an army into the desert wastes to fight fanatical tribesmen. It meant reforming the corrupt and ineffectual Egyptian government, rebuilding the Egyptian army and its Sudanese levies, building a railroad into enemy territory, and mastering the stupendous logistics of supplies and men. The stated objective was to erase the Mahdist regime as a military and political threat in the whole region. The climax of the campaign was the Battle of Omdurman in September 1898, in which the Dervish army was utterly decimated and routed.
In the end, over a year later, the successor of Mahdi Muhammad Ahmed, Abdallah ibn Muhammad, was killed and the remnants of his forces routed at the Battle of Umm Diwaykarat.
The Sudan Campaign had clear military and political objectives. The British government then had the will to take the necessary actions to destroy an enemy and discredit the ideology that moved it.
Churchill noted in The River War that, ” The fact that in Mohammedan law every woman must belong to some man as his absolute property – either as a child, a wife, or a concubine – must delay the final extinction of slavery until the faith of Islam has ceased to be a great power among men.”