This is what Nyerere, Karume agreed on Tanzania
On April 26, 1964, The Father of Nation Mwalimu Julius Nyerere and the First Zanzibar's President Abeid Arnan Karume united Tanganyika and Zanzibar to form the United Republic of Tanzania. The Union was supported by what came to be known as the Articles of Union. Here is the original document of the articles as agreed by the founders of the two nations.
WHEREAS the Governments of the Republic of Tanganyika and of the Peoples' Republic of Zanzibar being mindful of the long association of the peoples of these lands and of their ties of kinship and amity, and being desirous of furthering that association and strengthening of these ties and of furthering the unity of African peoples have met and considered the union of the Republic of Tanganyika with the Peoples Republic of Zanzibar:
AND WHEREAS the Governments of the Republic of Tanganyika and of the Peoples' Republic of Zanzibar are desirous that the two Republics shall be united in one Sovereign Republic in accordance with the Articles hereinafter contained:-
It is therefore AGREED between the Governments of the Republic of Tanganyika and of the Peoples' Republic of Zanzibar as follows: -
(i) The Republic of Tanganyika and the Peoples' Republic of Zanzibar shall be united in one Sovereign Republic.
(ii) During the period from the commencement of the union until the Constituent Assembly provided for in Article (vii) shall have met and adopted a Constitution for the united…