Question: What area in South Africa does Washing of the Spears and Shaka have in common?

Context paragraphs:
Ngwenya (surname): Ngwenya is a surname common in Southern Africa, ptimarily found in South africa ,Swaziland ,Matebeleland in Zimbabwe,Botswana,Lesotho,Mozambique ,ZambiaMalawi,Tanzania and Mostly due Difecane under Shaka when most tribes migrating from the Zulu land were subjugating other smaller less organised tribes.Similar to your Khumalo,Ndlovu,Sithole,Nyathi,Nkomo,Dlamini,Jele ,Mazibuko,Zungu Kunene,Zulu,Xaba,Masinga etc these are just a few people who left Zululand under the expansion of the Zulu nation under King Shaka. Ngwenya surname</ref> originally from the Nguni tribe but scattered between Zulu tribe, Swati tribe who left Zululand under Sobhuza Ndebele who left Zulu land with Mzilikaziand some Shangaan who went with Soshangaan Ka Gaza to the now mozambique under Gaza and xhosa but Originally from the Northern Nguni currently Known as the Zulu

Nathaniel Isaacs: Nathaniel Isaacs (1808–1872) was an English adventurer who played a part in the history of Natal, South Africa.  He wrote a book spread over two volumes (whose accuracy is now disputed) called "Travels and Adventures in Eastern Africa".  This book subsequently became one of the principal sources quoted by writers of the History of Natal including Morris ("The Washing of the Spears: The Rise and Fall of the Zulu Nation"),

Boom Shaka: Boom Shaka was a pioneering kwaito music group from South Africa, consisting of Junior Sokhela, Lebo Mathosa, Theo Nhlengethwa and Thembi Seete.  Their first album was produced in 1994.  Boom Shaka's first single "It's About Time" was released in 1993.  This track (and others by Boom Shaka) can be found on Stern's Music website (http://www.sternsmusic.com/discography_detailed/665).  Boom Shaka became one of the most successful bands of the mid-1990s in South Africa and their music became the soundtrack for many young people in the newly democratic South Africa.  Boom Shaka was able to break into the international market and achieved success outside of South Africa in London among other places.

Nguni people: The Nguni people are a group of Bantu peoples who primarily speak Nguni languages and currently reside predominantly in Southern Africa.  The Nguni people are Xhosa, Zulu, Ndebele and Swazi people.  They predominantly live in South Africa.  Swazi people live in both South Africa and Swaziland.  While Ndebele people live in both South Africa and Zimbabwe.  In South Africa, the historic Nguni kingdoms of the Xhosa, Zulu, Ndebele and Swazi lie on the present provinces of the Eastern Cape, KwaZulu-Natal, and Mpumalanga.  The most notable of these kingdoms is the Zulu Kingdom which was ruled by Shaka kaSenzangakhona, a powerful warrior king whose conquest took place in the early nineteenth century.

Kedestes chaca: Kedestes chaca, the Shaka's ranger or Shaka's skipper, is a butterfly of the Hesperiidae family.  It is found in South Africa, from the southern and eastern slopes of the Drakensberg foothills in the eastern Cape through the Kokstad area into KwaZulu-Natal.

Washing of the Spears: The Washing of the Spears is a 1965 book about the "Zulu Nation under Shaka" and the Anglo-Zulu War of 1879, written by Donald R. Morris.

History of South Africa (1815–1910): During the Napoleonic Wars, the Cape Colony was annexed by the British and officially became their colony in 1815.  Britain encouraged settlers to the Cape, and in particular, sponsored the 1820 Settlers to farm in the disputed area between the colony and the Xhosa in what is now the Eastern Cape.  The changing image of the Cape from Dutch to British excluded the Dutch farmers in the area, the Boers who in the 1820s started their Great Trek to the northern areas of modern South Africa.  This period also marked the rise in power of the Zulu under their king Shaka Zulu.  Subsequently several conflicts arose between the British, Boers and Zulus, which led to the Zulu defeat and the ultimate Boer defeat in the Second Anglo-Boer War.  However, the Treaty of Vereeniging established the framework of South African limited independence as the Union of South Africa.

Henry Francis Fynn: Henry Francis Fynn (29 March 1803 in Grosvenor Square, London, England – 20 September 1861 in Durban, Natal, South Africa) was an English traveler and trader.  His diary covers the period from 1824 to 1836 and is the story of the first white settler in Natal who had reached an agreement with the Zulu by befriending Shaka Zulu, who gave him the strip of land in which the town of Durban was situated.  No prior settlements in the area have ever been documented or known by the Zulu or Xhosa.  His diary provides a contemporary account of Shaka and the kingdom of the Zulu in South Africa.

Zulu royal family: The Zulu royal family consists of the reigning monarch of the Zulus of South Africa, King Goodwill Zwelithini kaBhekuzulu, his consorts, legitimate descendants, near relatives and male-line descendants of his great-grandfather, King Mpande who, as a half-brother of the Zulu "Pater Patriae", King Shaka, reigned from 1840 to 1872.  Shaka's policies and conquests transformed a small clan into one of South Africa's most influential pre-colonial realms, extending over much of what is now KwaZulu-Natal.

Shaka: Shaka kaSenzangakhona (c. 1787 – 22 September 1828), also known as Shaka Zulu (] ), was one of the most influential monarchs of the Zulu Kingdom.

Supporting paragraphs: Washing of the Spears Shaka
Answer: Zulu