The Church of God, Alexander Jackson Sr. General Overseer, formerly The Church of God under the leadership of Bishop James C. Nabors, is a Pentecostal Christian denomination with roots in the late 19th-century American Holiness movement and early 20th-century Pentecostal revival. It shares a common history with The Church of God (Charleston, Tennessee) (TCOG) until 2006 when a separation occurred. The official name is The Church of God. The phrase "Alexander Jackson Sr. General Overseer" is added to distinguish this group from many others called Church of God.