Native artillery crossing the river at the camp at Prah-su, on the river Prah. Native bearers or carriers bring artillery over the bridge. In 1873, after decades of an uneasy relationship between the British and the Acing people of central Ghana, the British attacked and virtually destroyed the Asanti capital of Kumasi, and officially declared Ghana a crown colony on 24 July 1874. Date: 21 February 1874