The British cavalry were the first British Army units to see action during the First World War. Captain Hornby of the 4th (Royal Irish) Dragoon Guards is reputed to have been the first British soldier to kill a German soldier, using his sword, and Drummer Edward Thomas of the same regiment is reputed to have fired the first British shot shortly after 06:30 on 22 August 1914, near the Belgian village of Casteau. In the very early days of World War One, cavalry was a devastating weapon when used against infantry. ... One of the last cavalry charges of the war came at the Battle of the Somme in 1916. The attack was on July 14th on High Wood – a German strongpoint that was holding up the British advance. Any information on this attack would be gratefully accepted.