Imperial Reckoning: The Untold Story of Britain’s Gulag in Kenya (2005) by Caroline Elkins is a Pulitzer Prize-winning historical investigation. It exposes the systematic violence used by the British colonial government to suppress the Mau Mau uprising in 1950s Kenya. Key Findings
The British detained nearly the entire Kikuyu population—roughly 1.5 million people—in a system of camps and barbed-wire villages.
While official figures cited 11,503 deaths, Elkins estimates that tens of thousands—and possibly up to 300,000—Kikuyu are "unaccounted for".