Complex sentence: After the conflict was over, rather then allow the Cossacks to settle across Southern Ukraine, the Russian Government began to resettle them on the Kuban and in 1860, they changed their name and became the Kuban Cossacks.
Split into simpler sentences: After the conflict was over, rather than allow the Cossacks to settle across Southern Ukraine, the Russian government began to resettle them on the Kuban. In 1860, they changed their name and became the Kuban Cossacks.