Following the outbreak of the Second Boer War in October 1899, Allenby returned to his regiment, and the Inniskillings embarked at Queenstown and landed at Cape Town, South Africa, later that year. He took part in the actions at Colesberg on 11 January 1900, Klip Drift on 15 February 1900 and Dronfield Ridge on 16 February 1900, and was mentioned in despatches by the commander-in-chief, Lord Roberts on 31 March 1900.