Oliver Cromwell was an undistinguished backbench MP in his forties when the English Civil War began. Like many other gentleman farmers, he recruited a regiment and led it to war. However, unlike most of the amateur leaders, he demonstrated a remarkable aptitude for soldiering and rose to become one of Parliament's leading generals. Ultimately he would use his power-base within the army to seize power and rule all Britain. General Sir Frank Kitson's concise military biography reveals how and why Cromwell proved so successful. His accessible narrative provides an excellent potted history of the Civil War, peppered with asides on the practicalities of soldiering in the 17th century.