In July 1900 "D" Battery moved to Pretoria to operate in the Transvaal in a column commanded by Colonel Ian Hamilton, and saw much action, with a section particularly distinguishing itself at the battle of Leliefontein, when 100 men of the Royal Canadian Dragoons and 2nd Canadian Mounted Rifles, bolstered by a single Colt machine gun and the two 12-pounders of the battery, repelled an attack by 200 mounted Boers while covering the withdrawal of the main column. Three Victoria Crosses were won during the engagement.