The New Model Army was one of the best-known and most effective armies ever raised in England. Oliver Cromwell was both its greatest battlefield commander and the political leader whose position depended on its support. In this meticulously researched and accessible new study, Keith Roberts describes how Cromwell's army was recruited, inspired, organized, trained and equipped. He also sets its strategic and tactical operation in the context of the theory and practice of warfare in seventeenth-century Europe.