Boer War - The British Army in South Africa, 1899-1902 The Second Boer War was Britain s first modern war, delivering many of the challenges that would dominate World War One and beyond. But it was a conflict waged by generals rooted in colonial conquests and would prove a steep learning curve. In Britain there was popular support for the war and tens of thousands from across the class divide volunteered. It was the birthplace of modern guerrilla warfare, concentration camps, blockhouses, and scorched earth tactics. Boer War is a must-read for anyone interested in British and South African history.