A state of emergency was declared in Kenya by the British governor in response to organised resistance to colonialism known as the Mau Mau Rebellion.
The next day "Operation Jock Scott" was launched and the British carried out a mass arrest of almost 200 within Nairobi. Jomo Kenyatta along with Bildad Kaggia, Kung'u Karumba, Fred Kubai, Paul Ngei, and Achieng' Oneko were six leading Kenyan nationalists who were amongst those arrested. They became known as the "Kapenguria Six" and were tried and eventually imprisoned for their anti-colonial activity.
Five of the six went on to serve in post independence government.
The following clip gives a brief outline of the prison experience of the Kapenguria Six:



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