The Battle of Isandlwana on 22 January 1879 was the first major encounter in the Anglo–Zulu War between the British Empire and the Zulu Kingdom. Eleven days after the British commenced their invasion of Zululand in South Africa, a Zulu force of some 20,000 warriors attacked a portion of the British main column consisting of about 1,800 British, colonial and native troops and perhaps 400 civilians. The Zulus were equipped mainly with the traditional assegai iron spears and cow-hide shields, but also had a number of muskets and old rifles. The British and colonial troops were armed with the modern Martini-Henry breech-loading rifle and two 7-pounder (3-inch, 76 mm) mountain guns deployed as field guns, as well as a Hale rocket battery. Despite a vast disadvantage in weapons technology, the Zulus ultimately overwhelmed the British, killing over 1,300 troops, including all those out on the forward firing line. The Zulu army suffered anywhere from 1,000 to 2,500 killed.
The battle was a decisive victory for the Zulus and caused the defeat of the first British invasion of Zululand. The British Army had suffered its worst defeat against an indigenous foe with vastly inferior military technology. Isandlwana resulted in the British taking a much more aggressive approach in the Anglo–Zulu War, leading to a heavily reinforced second invasion and the destruction of King Cetshwayo's hopes of a negotiated peace.
source: wikipedia
