Complex sentence: History tells us that The Kalangas emerged as a mixture of mainly Karanga groups being incooparated into the Ndebele culture as recently as the early 1800s, on the other hand history tells us that the Rozvis have been around since the early sixteenth century.
Split into simpler sentences: History tells us that the Kalangas emerged as recently as the early 1800s, as a mixture of mainly Karanga groups being incooparated into the Ndebele culture. On the other hand, history also tells us that the Rozvis have been around since the early sixteenth century.