23 December 1962
President Kwame Nkrumah of Ghana (formerly Gold Coast), a leading exponent of Pan-Africanism, ordered the release of the last of his political prisoners, detained under the Preventive Detention Act of 1958. Many of the political prisoners, who were labelled militants, were arrested in order to calm down the growing opposition against Kwame Nkrumah's government, which had rejected multiparty rule in favour of one party rule and scientific socialism.
References

Bobby-Evans, A, This Day in African History: 23 December, from About.com, [online], Available at africanhistory.about.com [Accessed 16 September 2011]