Alanbrooke’s six years at the apex of the British military, at a time when the nation faced its greatest crisis of modern history, tells a story of the inherent value of deep professional competence, a willingness to register dissent, and a commitment to an ideal greater than any single organization or individual. Alanbrooke proved the criticality of remaining unruffled by those things outside of his control, yet demanding the very best from those within his domain.