Second Anglo-Ashanti War

The Second Anglo-Ashanti War was from 1863 to 1864. With the exception of a few minor Ashanti skirmishes across the Pra in 1853 and 1854, the peace between the Ashanti and the British Empire had remained unbroken for over 30 years. Then, in 1863, a large Ashanti delegation crossed the river pursuing a fugitive, Kwesi Gyana. There was fighting, with casualties on both sides, but the governor’s request for troops from England was declined and sickness forced the withdrawal of his troops.

Source: military.wikia.org