The county have played a key role in the development of the SAS with Credenhill the base for the squad. Here are five Herefordshire figures who have played a key role in the development of the SAS. John WoodhouseJohn Woodhouse was crucial to the post-war SAS because he helped establish the rigorous selection process that became the model for modern SAS training. Michael RoseMichael Rose is another major commander who helped define the modern SAS as a disciplined, adaptable special forces regiment. These five figures have been instrumental in shaping the SAS into the elite force it is today.