The years 903 to 917 saw a well planned Campaign to re-establish Mercian control from Gloucester to the Mersey, led by Aethelflaed, daughter of Alfred the Great. This Campaign reached Tamworth in 913. The Campaign spread from Tamworth to the Mersey and then eastwards to Bakewell, in the Peak District, important border country, prior to the attack in 917 on the town of Derby which was controlled by the Danes. The capture by Aethelflaed of Derby in 917 and Nottingham in 918 led to extensive peace negotiations with the Danes and the growth of Saxon control across England. Aethelflaed died in Tamworth in 918. The information in this book reviews the overall framework of the Campaign from Tamworth to Bakewell and then examines a new data set based on place names in this area. The locations identified show a remarkable degree of forward planning and surveying in the Campaign based on strategically placed small forts. It then examines Saxon influences at Bakewell including a rectangular street layout, a water mill and a river crossing point, many of which were masked by later Norman developments.