Complex sentence: He originally tried to include members of a variety of political and religious groups including representatives of the Cao Đài and Hòa Hảo, which still had remnants of their private armies intact after their dismantling by Diệm in 1955.
Split into simpler sentences: He originally tried to include members of a variety of political and religious groups including representatives of the Cao Đài and Hòa Hảo. The Cao Đài and Hòa Hảo still had remnants of their private armies intact after their dismantling by Diệm in 1955.