What does 1 Kings 1:8 mean?

But Zadok the priest, Benaiah son of Jehoiada, Nathan the prophet, Shimei, Rei, and David's personal guards did not side with Adonijah. 1 Kings 1:8 - Modern Text Bible

(Not everyone supports Adonijah. Key leaders and David's loyal men stay out of his camp, hinting at a divided court.)