Complex sentence: As a member of the British Army's volunteer force, Openshaw was appointed surgeon to the Volunteer Medical Staff Corps in 1888, in which capacity he went to South Africa as surgeon to the Imperial Yeomanry Field Hospital during the First Boer War.
Split into simpler sentences: As a member of the British Army's volunteer force, Openshaw was appointed surgeon to the Volunteer Medical Staff Corps in 1888. He travelled to South Africa as surgeon to the Imperial Yeomanry Field Hospital during the First Boer War.