The United Daughters of the Confederacy, also known as the UDC, is a
hereditary association of Southern women established in 1894. The stated
purpose of the organization is to commemorate Confederate soldiers and
its main activity is the erection of monuments to these men, and its
promotion of the Lost Cause movement (a set of revisionist beliefs that
describes the Confederate cause as a heroic one against great odds
despite its defeat).
Today, the Southern Poverty Law Center lists them as a Neo-Confederate
group. Some historians have also described them as supporting white
supremacist ideas.
https://en.wikipedia.org/wiki/United_Daughters_of_the_Confederacy
https://en.wikipedia.org/wiki/Lost_Cause_of_the_Confederacy