In August 1914 the organisation of the infantry division called for a reconnaissance element which was provided by a squadron of cavalry and it was the role of the 15th Hussars (15 H) to provide that squadron for each of the 1st 2nd and 3rd Infantry Divisions. The other three divisions of the original BEF were served by squadrons of the 19th Hussars and so it may seem appropriate that when in 1922 the number of cavalry regiments were reduced by amalgamations the 15th combined with the 19th to form a new regiment - the 15th/19th Hussars. When war came in 1914 15 H had been back in England nearly two years after an overseas tour of fourteen years and by 18th August the three squadrons were in France with their divisions. The first four chapters describe the involvement of the squadrons in the early fighting - Mons and the retreat Marne Aisne and Ypres. In April 1915 the regiment was re-formed as a single unit and posted to the newly formed 9th Cavalry Brigade in 1st Cavalry Division (as was 19 H) their places in the three infantry divisions were taken by Yeomanry. For the rest of the war the Regiment remained in the 9th Brigade 3rd Cavalry Division on the Western Front and fought in many actions as their twenty-three Battle Honours testify. They were awarded one of the earliest VCs to be won Cpl Garforth. There are five appendices one of them is a diary of marches billets and bivouacs of the Regiment from 27th July 1914 to 6th September 1919 and another most useful one gives the strengths of the Regiment (officers and other ranks) on various dates between 29th April 1915 and 31st March 1921 figures are also given for riding draught and pack horses and mules. The casualty lists show not only fatalities but also wounded identifying those wounded more than once and those missing. There is a list of officers of the Regiment and attached officers who served between 1914 and 1922 and a list of NCOs and men who were commissioned during the war. There is an index.