In the 1700s Mohammad al Wahabb along with King Saud conquered the Arabian peninsula and as you said they got the backsliding Muslims who were bringing other religious trappings into Islam; back to the fundamentals of Islam as practiced by Muhammad-and Caliphs Abu Bakr -Umar-Uthman and Ali.
Wahhabism is a fundamental version of Sunni Islam. -Tom
Thank you for the specifics, I did not know that.