Anglo-Zulu War his own initiative, without the approval of the British government and with the intent of instigating a war with the Zulu, had presented an ultimatum on 11 December 1878, to the Zulu king Cetshwayo with which the Zulu king could not comply, including disbanding his army and abandoning key cultural traditions. Bartle Frere then sent Lord Chelmsford to invade Zululand after this ultimatum was not met. The war is notable for several particularly bloody battles, including an opening victory of the Zulu at the Battle of Isandlwana, followed by the defeat of a large Zulu army at Rorke's Drift by
Anglo-Zulu War they left or protected if they remained. In addition, Frere planned to use the meeting on the boundary commission report with the Zulu representatives to also present a surprise ultimatum he had devised that would allow British forces under Lord Chelmsford, which he had previously been instructed to use only in defense against a Zulu invasion of Natal, to instead invade Zululand. Three incidents occurred in late July, August and September which Frere seized upon as his "casus belli" and were the basis for the ultimatum to which Frere knew Cetshwayo could not comply, giving Frere a pretext to attack