Historical country records
Tanzania historical timeline
Tanzania
| Date or term | Officeholder or event | Category |
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| 28 Apr 1888 | Germany obtains a lease of the coastal strip from the sultan of Zanzibar | Leaders |
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| 1891 | German protectorate (German East Africa) | Leaders |
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| 1916 | British occupation | Leaders |
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| 20 Jul 1922 | League of Nations mandate (Tanganyika) | Leaders |
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| 13 Dec 1946 | United Nations trust territory | Leaders |
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| 9 Dec 1961 | independence | Leaders |
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| 9 Dec 1962 | Republic of Tanganyika | Leaders |
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| 26 Apr 1964 | United Republic of Tanganyika and Zanzibar | Leaders |
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| 29 Oct 1964 | United Republic of Tanzania | Leaders |
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| 8 Feb 1889 - 21 Feb 1891 | Hermann von Wissmann | Reichskommissar |
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| 14 Feb 1891 - 15 Sep 1893 | Julius Freiherr von Soden | Governors |
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| 15 Sep 1893 - 25 Feb 1895 | Friedrich Radbod Freiherr von Schele (b. 1847 - d. 1904) | Governors |
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| 26 Apr 1895 - 3 Dec 1896 | Hermann von Wissmann | Governors |
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| 3 Dec 1896 - 12 Mar 1901 | Eduard von Liebert | Governors |
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| 12 Mar 1901 - 15 Apr 1906 | Gustav Adolf Graf von Götzen | Governors |
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| 15 Apr 1906 - 22 Apr 1912 | Georg Albrecht Freiherr von Rechenberg (b. 1861 - d. 1935) | Governors |
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| 22 Apr 1912 - 14 Nov 1918 | Albert Heinrich Schnee | Governors |
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| 9 Oct 1916 - 22 Jul 1920 | Horace Archer Byatt (from 1918, Sir Horace Archer Byatt) (b. 1875 - d. 1933) | Administrator |
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| 22 Jul 1920 - 5 Mar 1925 | Sir Horace Archer Byatt | Governors |
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| 5 Mar 1925 - Jan 1931 | Donald Charles Cameron | Governors |
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| Jan 1931 - Feb 1934 | George Stewart Symes | Governors |
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| Feb 1934 - 1938 | Sir Harold Alfred MacMichael | Governors |
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| 1938 - 19 Jun 1941 | Sir Mark Young | Governors |
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| 19 Jun 1941 - 28 Apr 1945 | Sir Wilfrid Edward Francis Jackson | Governors |
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| 28 Apr 1945 - 18 Jun 1949 | Sir William Denis Battershill | Governors |
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| 18 Jun 1949 - Jun 1958 | Sir Edward Francis Twining | Governors |
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| 15 Jul 1958 - 9 Dec 1961 | Sir Richard Gordon Turnbull | Governors |
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| 9 Dec 1961 - 9 Dec 1962 | Sir Richard Gordon Turnbull | Governor-general (representing the British monarch as head of state) |
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| 9 Dec 1962 - 5 Nov 1985 | Julius Nyerere | Presidents |
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| 5 Nov 1985 - 23 Nov 1995 | Ali Hassan Mwinyi | Presidents |
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| 23 Nov 1995 - 21 Dec 2005 | Benjamin Mkapa | Presidents |
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| 21 Dec 2005 - | Jakaya Kikwete | Presidents |
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| 2 Sep 1960 - 1 May 1961 | Julius Nyerere | Chief minister |
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| 1 May 1961 - 22 Jan 1962 | Julius Nyerere | Prime ministers |
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| 22 Jan 1962 - 9 Dec 1962 | Rashidi Kawawa (1st time) | Prime ministers |
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| 17 Feb 1972 - 13 Feb 1977 | Rashidi Kawawa (2nd time) | Prime ministers |
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| 13 Feb 1977 - 7 Nov 1980 | Edward Moringe Sokoine (1st time) | Prime ministers |
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| 7 Nov 1980 - 24 Feb 1983 | Cleopa David Msuya (1st time) | Prime ministers |
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| 24 Feb 1983 - 12 Apr 1984 | Edward Moringe Sokoine (2nd time) | Prime ministers |
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| 24 Apr 1984 - 5 Nov 1985 | Salim Ahmed Salim | Prime ministers |
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| 5 Nov 1985 - 9 Nov 1990 | Joseph Warioba | Prime ministers |
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| 9 Nov 1990 - 7 Dec 1994 | John Malecela | Prime ministers |
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| 7 Dec 1994 - 28 Nov 1995 | Cleopa David Msuya (2nd time) | Prime ministers |
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| 28 Nov 1995 - 30 Dec 2005 | Frederick Sumaye | Prime ministers |
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| 30 Dec 2005 - 9 Feb 2008 | Edward Lowassa | Prime ministers |
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| 9 Feb 2008 - | Mizengo Pinda | Prime ministers |
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Zanzibar
| Date or term | Officeholder or event | Category |
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| 14 Sep 1806 | Al ´Bu Sa`id lineage from Oman begins to rule Zanzibar | Leaders |
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| 6 Apr 1861 | Zanzibar separated from Oman and style Sultan recognized by U.K. mediation | Leaders |
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| 7 Nov 1890 | British protectorate proclaimed | Leaders |
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| 1895 | coastal domains of Zanzibar become Kenya Protectorate under U.K. (and are relinquished to Kenya on Kenya's independence 12 Dec 1963) | Leaders |
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| 10 Dec 1963 | British protectorate terminated | Leaders |
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| 12 Jan 1964 | People's Republic of Zanzibar | Leaders |
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| 27 Apr 1964 | united with Tanganyika | Leaders |
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| 14 Sep 1806 - 19 Oct 1856 | Sayyid Sa`id ibn Sultan | Al ´Bu Sa`id dynasty |
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| 19 Oct 1856 - 6 Apr 1861 | Sayyid Majid ibn Sa`id | Al ´Bu Sa`id dynasty |
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| 6 Apr 1861 - 7 Oct 1870 | Sayyid Majid ibn Sa`id | Al ´Bu Sa`id dynasty |
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| 7 Oct 1870 - 26 Mar 1888 | Sayyid Barghash ibn Sa`id | Al ´Bu Sa`id dynasty |
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| 27 Mar 1888 - 13 Feb 1890 | Sayyid Khalifa ibn Sa`id | Al ´Bu Sa`id dynasty |
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| 13 Feb 1890 - 5 Mar 1893 | Sayyid `Ali ibn Sa`id | Al ´Bu Sa`id dynasty |
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| 5 Mar 1893 - 25 Aug 1896 | Sayyid Hamid ibn Thuwayni | Al ´Bu Sa`id dynasty |
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| 25 Aug 1896 - 27 Aug 1896 | Sayyid Khalid ibn Barghash | Al ´Bu Sa`id dynasty |
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| 27 Aug 1896 - 18 Jul 1902 | Sayyid Hamud ibn Muhammad | Al ´Bu Sa`id dynasty |
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| 18 Jul 1902 - 8 Dec 1911 | Sayyid `Ali ibn Hamud | Al ´Bu Sa`id dynasty |
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| 9 Dec 1911 - 9 Oct 1960 | Sayyid Khalifa ibn Kharub | Al ´Bu Sa`id dynasty |
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| 9 Oct 1960 - 1 Jul 1963 | Sayyid `Abd Allah ibn Khalifa | Al ´Bu Sa`id dynasty |
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| 1 Jul 1963 - 12 Jan 1964 | Sayyid Jamshid ibn `Abd Allah | Al ´Bu Sa`id dynasty |
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| 12 Jan 1964 - 7 Apr 1972 | Sheikh Abeid Amani Karume | Presidents |
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| 11 Apr 1972 - 30 Jan 1984 | Sheikh Mwinyi Aboud Jumbe | Presidents |
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| 30 Jan 1984 - 24 Oct 1985 | Ali Hassan Mwinyi | Presidents |
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| 24 Oct 1985 - 25 Oct 1990 | Idris Abdul Wakil | Presidents |
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| 25 Oct 1990 - 8 Nov 2000 | Salmin Amour | Presidents |
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| 8 Nov 2000 - | Amani Abeid Karume | Presidents |
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| 23 Feb 1961 - 5 Jun 1961 | Geoffrey Charles Lawrence (acting) | Chief ministers |
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| 5 Jun 1961 - 24 Jun 1963 | Sheikh Muhammad Shamte Hamadi | Chief ministers |
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| 24 Jun 1963 - 12 Jan 1964 | Sheikh Muhammad Shamte Hamadi | Prime ministers |
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| 12 Jan 1964 - 27 Apr 1964 | Abdullah Kassim Hanga | Prime ministers |
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| 21 Feb 1983 - 6 Feb 1984 | Ramadani Baki | Chief ministers |
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| 6 Feb 1984 - 22 Jan 1988 | Seif Shariff Hamad | Chief ministers |
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| 25 Jan 1988 - 1 Nov 1995 | Omar Ali Juma | Chief ministers |
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| 1 Nov 1995 - 15 Nov 2000 | Mohamed Gharib Bilal | Chief ministers |
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| 15 Nov 2000 - | Shamsi Vuai Nahodha | Chief ministers |
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| 1891 - 1893 | Gerald Herbert Portal (from 1892, Sir Gerald Herbert Portal) (b. 1858 - d. 1894) | British consuls-general |
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| 1893 - 1894 | James Rennell Rodd | British consuls-general |
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| 1894 - 1900 | Arthur Henry Hardinge (from 1897, Sir Arthur Henry Hardinge) (b. 1859 - d. 1933) | British consuls-general |
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| 1900 - 1904 | Sir Charles Eliot | British consuls-general |
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| 1904 - 1909 | Basil Shillito Cave | British consuls-general |
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| 1909 - 13 Feb 1913 | Edward Clarke | British consuls-general |
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| 1 Jul 1913 - 1922 | Francis Barrow Pearce | Residents |
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| 1922 - 1923 | John Houston Sinclair | Residents |
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| Jan 1924 - 1929 | Alfred Claud Hollis (from 1927, Sir Alfred Claud Hollis) (b. 1874 - d. 1961) | Residents |
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| Dec 1929 - 1937 | Richard Sims Donkin Rankine Donkin Rankine) (b. 1875 - d. 1961) | Residents |
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| Oct 1937 - 1940 | John Hathorn Hall | Residents |
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| 1941 - 1946 | Henry Guy Pilling | Residents |
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| 1946 - 1951 | Vincent Goncalves Glenday | Residents |
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| 1952 - 1954 | John Dalzell Rankine | Residents |
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| 2 Nov 1954 - 1959 | Henry Steven Potter (from 1956, Sir Henry Steven Potter) (b. 1904 - d. 1976) | Residents |
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| 1959 - 1963 | Arthur George Rixson Mooring | Residents |
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