On 24 August 1914 at Audregnies, Belgium, Captain Grenfell rode with the regiment in a charge against a large body of unbroken German infantry.
Tanggal 24 Agustus 1914 di Audregnies, Belgia, Kapten Grenfell bersama dengan resimen bertempur melawan pasukan besar infanteri Jerman yang bertahan.