Volume IV describes in fascinating detail the part the Cavalry played in the Boer War which lasted from 1899 to 1902, a war that saw the destruction of 350,000 out of the 500,000 horses employed by the British to win it.The chief subject of this volume is the "Cavalry Debate" which followed the Boer War. Could the Cavalry remain an essential part of the Army's "weapons systems" until the advent of sophisticated rifles.