Complex sentence: The Mark IV Martini-Henry rifle ended production in the year 1889, but remained in service throughout the British Empire until the end of the First World War, and was seen in use by some Afghani tribesmen even as late as the Soviet invasion.
Split into simpler sentences: The Mark IV Martini-Henry rifle ended production in the year 1889, but remained in service throughout the British Empire until the end of the First World War. It was seen in use by some Afghani tribesmen as late as the Soviet invasion.