European contact profoundly transformed the Coushatta (Koasati), a Muskogean people originally from present-day Alabama/Tennessee, later Louisiana/Texas.
Traditional Koasati (Muskogean) declined under pressure from English and French. Most Coushatta today speak English; Koasati is endangered (~200 speakers). Language revitalization programs exist.
Traditional animism and ceremonial cycles were supplanted by Christianity (Baptist, Methodist) through missionary activity. Some syncretic practices persist.
Shifted from hunting-gathering-horticulture to:
Clan-based matrilineal kinship and village organization gave way to nuclear families, US-style governance, and individual land allotments (Dawes Act impacts).
Traditional chief + council of elders replaced by elected tribal council and chairman under constitution (post-1973 recognition). Federal recognition restored sovereignty and self-governance capacity.
Despite displacement (Trail of Tears-era removals), disease, and assimilation pressure, the Coushatta preserved core identity, regained federal recognition, and built a modern tribal nation in Louisiana.