Heavy fighting soon again broke out in the Battle of Diamond Hill on 11 and 12 June, fought to prevent the Boer reinforcements from recapturing Pretoria. Men from each of the Australian contingents, most notable the New South Wales, and Western Australian Mounted Rifles all took part in this battle, which was seen as a victory by both sides. Lord Roberts was pleased to have forced the Boers to retreat from Pretoria, but the forces of Louis Botha had inflicted heavy casualties on the British forces.