Order of Mithras Carnival Association
The Order of Mithras Carnival Association, the oldest men's Carnival organization on the Mississippi Gulf Coast, was organized in Biloxi, Mississippi in 1924, and has held masked balls every year since, except for 1943-1945 (World War II) and 2006 (Hurricane Katrina). The order currently  has 150 members. Its masked ball is held on the Friday preceding Mardi Gras every year.

References

Biloxi, Mississippi
Harrison County, Mississippi
Organizations based in Mississippi
Mardi Gras
1924 establishments in Mississippi