Following the outbreak of war in August 1914, patriotic men throughout the country formed local volunteer corps with a view to supplementing the Army in the event of German invasion. The government was unwilling to accept their services until the spring of 1916 and maintained an uneasy relationship with what became the Volunteer Training Corps. However, shortage of manpower and the need to regulate its use led to the conversion of V.T.C. units into units of the Volunteer Force - part of the Armed Forces of the Crown and a forerunner of Britain's Second World War Home Guard. Herts V.R. tells the story of the Volunteer Training Corps and the Volunteer Force in detail, both nationally and in Hertfordshire, where three infantry battalions were raised, together with medical and transport sub-units.