This book presents a unit-level history of West Riding Territorial units from pre-war organization and mobilization through frontline service in France, following the experiences of the 49th and 62nd Infantry Divisions. It chronicles training, deployment, daily life in reserve and front-line operations, covering Somme preparations and actions, winter 1916–17, Cambrai attack and counterattack, the 1918 crises and final offensives, while briefly noting Yeomanry and support services. Illustrations and maps accompany the narrative; appendices record honours, awards and casualty rolls and the account focuses on infantry operations within the county association’s wartime contribution.