http://crossmap.christianpost.com/news/ag-and-cogic-leaders-gather-in-historic-meeting-7057
Encyclopedia of Christianity (Eerdmans, 2005), s.v. Pentecostal Churches:
Assemblies of God executive leadership hosted the executive leadership of the Church of God in Christ (COGIC) at the AG national office in Springfield, Missouri. The historic meeting marks the first time the full leadership of these Pentecostal movements - two of the largest in the U.S. - have gathered specifically to dialogue together.
[COGIC Presiding Bishop George] Wood reflected sorrowfully on the separation that occurred because of the racial culture at that time in America, when culture shaped the church into racial division rather than the Bible. The coming together of COGIC and AG leadership in a historic-time dialogue represents another step in the healing of a rift that occurred long ago.
Encyclopedia of Christianity (Eerdmans, 2005), s.v. Pentecostal Churches:
The foremost of the affiliations along racial lines was the formation of the General Council of the Assemblies of God (AG) in April 1914. Early in the movement many white Pentecostal ministers were ordained by Charles H. Mason (1866-1961) of the COGIC. . . . Organization of the AG may be attributed in part to theological differences with Mason, but it must also be recognized as racially motivated. The "open" invitation to attend the organizational meeting was conspicuously not circulated among African American congregations.