Complex sentence: The tactics used in the war by the British army caused a large backlash, with much public outrage at the use of scorched earth tactics, such as the burning of Boer homesteads, and the conditions in the concentration camps.
Split into simpler sentences: The tactics used in the war by the British army caused a large backlash. There was much public outrage at the use of scorched earth tactics such as the burning of Boer homesteads, and over the conditions in the concentration camps.