Zulu people of 1878, envoys of the British crown delivered an ultimatum to 11 chiefs representing the then-current king of the Zulu empire, Cetshwayo. Under the British terms delivered to the Zulu, Cetshwayo would have been required to disband his army and accept British sovereignty. Cetshwayo refused, and war between the Zulus and African contingents of the British crown began on January 12th, 1879. Despite an early victory for the Zulus at the Battle of Isandlwana on the 22nd of January, the British fought back and won the Battle at Rorke's Drift, and definitively defeated the Zulu army by July at the
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