25 September 2012
On 25 September 1901, the Kingdom of Ashanti was formally annexed by Great Britain as part of the Gold Coast colony. The Northern regions of the Gold Coast became part of the Gold Coast management in 1897. Led by Osei Tutu together with his chief priest, Ashanti changed the constitution and the symbols of office in order to expand the power of the kingdom. That change was made prior the annexation by Great Britain. Located in West Africa, the country (Ghana) became the first nation in Africa to gain independence from Britain in 1957 with Kwame Nkrumah as Prime Minister.
References

Boddy-Evans, A., 2011. ‘This Day in African History: 25 September’ from African History [online] Available at www.africanhistory.about.com [Accessed 04 August]|Nathaniel Turner.com, 2001. ‘Ashanti Chronology’ [online] Available at www.nthanielturner.com [Accessed 04 August 2011]|Browlie, I. and Burns, I.R., 1979. ‘Ghana-Togo’ in African Boundaries: a legal and diplomatic encylopaedia. United Kingdom: C Hurst and Co Publishers