The United Methodist Church has since 1985 been exploring a possible merger with three historically African-American Methodist denominations: the African Methodist Episcopal Church, the African Methodist Episcopal Zion Church, and the Christian Methodist Episcopal Church. A Commission on Pan Methodist Cooperation and Union formed in 2000 to carry out work on such a merger. In May 2012, The United Methodist Church entered into full communion with the African Methodist Episcopal Church, African Methodist Episcopal Zion Church, African Union Methodist Protestant Church, Christian Methodist Episcopal Church, and Union American Methodist Episcopal Church, in which these Churches agreed to "recognize each other's churches, share sacraments, and affirm their clergy and ministries."