Complex sentence: As the Mahdi's ablest general, he was largely responsible for the fate of Gordon and the loss of the Sudan to Egypt and the only foreign commander broke the British infantry square in Battle of Tamai, yet he lost the Battle.
Split into simpler sentences: As the Mahdi's ablest general, he was largely responsible for the fate of Gordon and the loss of the Sudan to Egypt. He was said to be the only foreign commander who broke the British infantry square, in Battle of Tamai, yet he lost the Battle.