The Muslims who traveled to new regions for the sole purpose of converting people to Islam were known as caliphs. merchants. nomads. missionaries.



Answer :

I believe the answer would be missionaries because the definition of missionaries is people that convert others to their own religion. Hope this helps you and have a great day!
The answer is missionaries. 

Missionaries are people who travel to a certain place in order to spread their faith. 

Caliphs are chief Muslim rulers, merchants are involved in trade, and nomads are people who move from region to region in order to live according to the climate (not to spread their religion).