Complex sentence: In 1889, the treaties of H. Johnson finally reduceing the state of regular war (spears were broken) between the Konde Chiefs and the Arabs, and in 1895 the British hanged Mlozi, a slave trader.
Split into simpler sentences: In 1889, the treaties of Harry Johnston reduced the state of regular war between the Konde Chiefs and the Arabs. In 1895 the British hanged Mlozi, a slave trader.