Philip Skippon was the third-most senior general in parliament's New Model Army during the British Civil Wars. A veteran of European Protestant armies during the period of the Thirty Years' War and long-serving commander of the London Trained Bands, no other high-ranking parliamentarian enjoyed such a long military career as Skippon. He was an author of religious books, an MP and a senior political figure in the republican and Cromwellian regimes. This is the first book to examine Skippon's career, which is used to shed new light on historical debates surrounding the Civil Wars and understand how military events of this period impacted upon broader political, social and cultural themes.