The United Church of Christ came into being in 1957 with the union of two Protestant denominations: the Evangelical and Reformed Church and the Congregational Christian Churches.  Each of these was the result of a union of two earlier denominations.
        The Congregational Churches were organized when the Pilgrims of Plymouth Plantation (1620) and the Puritans of the Massachusetts Bay Colony (1629) acknowledged their unity in the Cambridge Platform of 1648.  The Reformed Church in the United States traced its beginnings to congregations of German settlers in Pennsylvania founded from 1725 on.  Later, its size grew from Reformed settlers from Switzerland and other countries.
        The Christian Churches sprang up in the late 1700s and early 1800s in reaction to the theological and organizational rigidity of the Methodist, Presbyterian, and Baptist churches of the time.
        The Evangelical Synod of North America traced its beginning to an association of German Evangelical pastors in Missouri.  This association, founded in 1840, reflected the 1817 union of Lutheran and Reformed churches in Germany.
        Through the years, members of other groups such as Native Americans, African Americans, Asian Americans, Volga Germans, Armenians, Hungarians, and Hispanic Americans have joined with the four earlier groups.  Thus the United Church of Christ celebrates and continues a wide variety of traditions in its common life.