The General Conference Mennonite Church (GCMC) was a mainline association of Mennonite congregations based in North America from 1860 to 2002. The conference was formed in 1860 when congregations in Iowa invited North American Mennonites to join together in order to pursue common goals such as higher education and mission work. The conference was especially attractive to recent Mennonite and Amish immigrants to North America and expanded considerably when thousands of Russian Mennonites arrived in North America starting in the 1870s. Conference offices were located in Winnipeg, Manitoba and North Newton, Kansas. The conference supported a seminary and several colleges. In the 1990s the conference had 64,431 members in 410 congregations in Canada, the United States and South America. After decades of cooperation with the Mennonite Church, the two groups reorganized into Mennonite Church Canada in 2000 and Mennonite Church USA in 2002.

Mennonites are a group of Anabaptist Christian communities tracing their roots to the epoch of the Radical Reformation. The name Mennonites is derived from the cleric Menno Simons (1496–1561) of Friesland, part of the Holy Roman Empire, present day Netherlands. Menno Simons became a prominent leader within the wider Anabaptist movement and was a contemporary of Martin Luther (1483–1546) and Philip Melanchthon (1497-1560). Through his writings about the Reformation Simons articulated and formalized the teachings of earlier Swiss Anabaptist founders as well as early teachings of the Mennonites founded on the belief in both the mission and ministry of Jesus. Formal Mennonite beliefs were codified in the Dordrecht Confession of Faith (1632), which affirmed "the baptism of believers only, the washing of the feet as a symbol of servanthood, church discipline, the shunning of the excommunicated, the non-swearing of oaths, marriage within the same church", nonresistance, and in general, more emphasis on "true Christianity" involving "being Christian and obeying Christ" as they interpret it from the Holy Bible.