This tribe, the Bayogoula and Houma who had settled nearby were gradually becoming amalgamated. The Bayogoula and the Acotapissa seem to have combined first and then united with the Houma.

Bayogoula

When the colony of Louisiana was founded in 1699, this tribe was living on the west bank of the Mississippi River about 5 miles below Plaquemine at a place which still bears their name. The Mugulasha tribe was then living with them.

The Bayogoula were at war with the Houma. When the Mugulasha became too friendly with the Houmas, the Bayogoula attacked their fellow villagers, destroyed a considerable number and drove the rest away. They then invited the Acotapissa and Tiou to take their places. In 1706 the Taensa, who had abandoned their towns on Lake St. Joseph, settled in the Bayogoula as they had attacked the Mugulasha. The survivors were given a place to settle near the French fort on the Mississippi River. By 1725 they had moved above New Orleans. In 1739 they were living between the Acotapissa and the Houma and had partially become fused with them. Their subsequent history is given with the Houma.

Mugulasha

This tribe was living at a site a few miles above the present site of New Orleans on the opposite side of the river when LaSalle first encountered them in 1682. In 1699 they shared a village with the Bayogoula north of their former settlement. Between 1682 and 1699 the Mugulasha and the Quinipissa joined together. The chief of the Quinipissa in 1682, when the French first entered the territory, also served as the chief of the Mugulasha in 1699. In May, 1700 they were attacked by their fellow villagers, the Bayogoula, and were almost completely destroyed. Survivors probably united with the Bayogoula or Houma.

Okelousa

In 1541 the Spaniards described them as a tribe “of more than ninety villagers not subject to anyone, with a very warlike people and much dreaded”, occupying a fertile land.

In 1682 they appear as allies of the Houma in the destruction of a Tangipahoa village on the east bank of the Mississippi River. They were a wandering people living west of the river on two little lakes to the west of and above Point Coupee.

By the 18th century they were a small tribe living west of the lower course of the Mississippi River. They evidently joined the Houma tribe and ceased to exist as a distinct group.