When did the mormons stop practicing pologamy?

The Church of Jesus Christ of Latter-day Saints (the "Mormon" church) discontinued the practice of polygamy in the United States in 1890 and internationally in 1903. Anyone found entering into a polygamous marriage since that time has been excommunicated from the church. The polygamy ban caused some polygamy supporters to split from the church and create their own groups, many of which are still in existence today. Members of these groups often refer to themselves as "Mormon Fundamentalists" although they are not affiliated with the mainstream Mormon church.