Complex sentence: The immigration of Carolinians to Saipan began in the early 1800s, after the Spanish reduced the local population of Chamorro natives to just 3,700, they began to immigrate mostly sailing from small canoes from other islands, which had previously been devestated by a typhoon.
Split into simpler sentences: The immigration of Carolinians to Saipan began in the early 1800s, after the Spanish reduced the local population of Chamorro natives to just 3,700. They began to immigrate mostly sailing from small canoes from other islands, which had previously been devestated by a typhoon.