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
Wiltshire Regiment Charles Pearson besieged by the Zulu impis. At the Battle of Gingindlovu, the 99th helped defeat a Zulu impi that tried to overrun the British while laagered. Although it would not participate in the final battle at Ulundi, the 99th was honoured for its service in the Anglo-Zulu War, being awarded the battle honour South Africa 1879. It would be the last battle honour earned by the 99th as an independent regiment. In 1881, following up on the earlier Cardwell Reforms of 1872, the 99th was merged with the 62nd Regiment of Foot as part of the Childers reforms to