Congregationalists constituted about 85-90% of the membership of the new denomination; this caused few if any resentments or conflicts because, by and large, the two groups did not overlap each other geographically, except in parts of New England, upstate New York, Ohio, and among African-American churches in North Carolina. Regional judicatories and national domestic and foreign mission agencies merged quite smoothly, often continuing to use varying terminologies (e.g., "convention," "conference," "association"), depending on custom. On the domestic front, most of the new church planting efforts were concentrated in newly developing areas such as southern California, Arizona, Florida, and suburbs of major Midwestern cities (e.g., Chicago, Detroit, Minneapolis). Abroad, many CC missionary efforts shifted their emphases toward medical and social services, particularly after many of the churches Congregationalists had founded in earlier decades had formed autonomous bodies of their own.