On 24 August 1914 at Audregnies, Belgium, Captain Grenfell rode with the regiment in a charge against a large body of unbroken German infantry. Damages of friendly army were so heavy, and Grenfell was left as the senior officer. When he was reorganizing the regiment behind a railway bank, he was twice hit and severely wounded. But once he was asked to save the guns by Major Ernest Wright Alexander of the 119th Battery, Royal Field Artillery, Grenfell and some volunteers helped to push the guns out of range of enemy fire, under a shower of bullets.