 Nyorai kupfuurira kweiyi ndima - McMahon akashanda muHondo yechipiri yeBoer uye musi wa9 Gumiguru 1899 akatumirwa kuGeneral Staff kunoshanda semubatsiri-de-camp ADC kune mukuru mukuru wevarwi. Akanga aripo pa 11 October Relief of Ladysmith uye 15 December Battle of Colenso. McMahon akabata chinzvimbo cheADC kusvikira agadzwa sa brigade major we6th Infantry Brigade musi wa 29 Kubvumbi 1900. Akashanda mumabasa muOrange River Colony uye akakuvara zvakaipisisa muhondo panguva yebasa muTugela Heights. Akataurwa nezvake mumashoko nokuda kwebasa rake naGeneral Redvers Buller musi wa 30 March 1900. 