The Mingrelians are descendants of several Colchian tribes which later came under the influence of their ethnic kin from eastern Georgia (Iberia). Early in the Middle Ages, their aristocracy and clergy, later followed by laymen, adopted Georgian as a language of literacy and culture. After the fragmentation of the Kingdom of Georgia in the 15th century, Mingrelia was an autonomous principality which was embroiled in a series of conflicts with other Georgian polities until being annexed by the Russian Empire in the 1800s.
In several censuses under the Russian Empire and the early Soviet Union, Mingrelians were considered a separate group, but were classified under the broader category of Georgian in the 1930s. Currently, most Mingrelians identify themselves as "Georgian" and have preserved many characteristic cultural features including the Mingrelian language, but the number of its speakers have declined.
The first President of an independent Georgia, Zviad Gamsakhurdia (1939-1993), was a Mingrelian. Therefore, after the violent Coup d'etat of December 21, 1991 - January 6, 1992, Samegrelo became the centre of a civil war, which ended with the defeat of Gamsakhurdia's supporters.