Kambona became the secretary-general of the Tanganyika African National Union (TANU) during the struggle for independence and worked closely with Nyerere, who was president of TANU, the party that led Tanganyika to independence. Tanganyika secured independence from Britain on December 9, 1961.[citation needed]
In February 1967, Tanzania adopted the Arusha Declaration, an economic and political blueprint for the transformation of Tanzania into a socialist state. Kambona was opposed to this fundamental change and argued that the government should first launch a pilot scheme to see if the policy was going to work on a national scale.[citation needed]
Tony Laurence states in his book The Dar Mutiny of 1964, published by Book Guild Publishing, that, fearing for his life, Kambona went to live in exile in Great Britain with no financial support and took a number of low-paying jobs to support himself and his family.[citation needed]
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Godfrey Mwakikagile, chapter 13, "Coup Attempts Against President Julius Nyerere and Reflections on Coup Leader Oscar Kambona by Andrew Nyerere," in his book Nyerere and Africa: End of an Era, 2nd Edition (Las Vegas, Nevada: Protea Publishing Co., 2005), pp. 359 – 377.
The book covers extensively the 1970 treason trial in which Oscar Kambona was implicated as the ring leader. The trial was open to the public.
The author has also addressed the army mutiny of 1964 in Tanganyika among many other subjects.
Jacqueline Audrey Kalley, Southern African Political History: A Chronology of Key Political Events from Independence to Mid-1997 (Greenwood Press, 1999), p. 594, where she says President Julius Nyerere challenged Oscar Kambona to return to Tanzania and testify before a judicial commission that he had not deposited large sums of money in his account.
"Bibi Titi and the Treason Trial of 1970," in The East African, Nairobi, Kenya, 10–16 November 1999.
Adam Seftel and Annie Smyth, editors, Tanzania: The Story of Julius Nyerere, Mkuki na Nyota Publishers, Dar es Salaam, Tanzania, and Fountain Publishers, Kampala, Uganda.