Complex sentence: He then commanded the Malakand Field Force and the Buner Field Force, relieving the British garrison under Brigadier-General William Hope Meiklejohn during the siege of Malakand in 1897, until 1898, and at the end of this command he was promoted to major-general.
Split into simpler sentences: He then commanded the Malakand Field Force and the Buner Field Force, relieving the British garrison during the siege of Malakand. At the end of this command he was promoted to major-general.