The 500 Irish and Irish-Americans fought the British. Often these Irish commandos were fighting opposite such Irish regiments as the Royal Dublin Fusiliers and the Royal Inniskilling Fusiliers. From the hills around the besieged town of Ladysmith to the plains of the Orange Free State, MacBride's Brigade first looked after the Boers' great Long Tom gun, then fought in the Battle of Colenso and later held the rearguard, harassing Lord Roberts' cavalry as the Boer army retreated.