Answer:
The Caddo tribe of Louisiana initially used the ambiguity left by the Louisiana Purchase to its advantage. The boundary between Spanish Texas and American Louisiana was not defined in the treaty. Representatives of France, Spain, and the United States continued to debate these lines after 1803. Chief Dehahuit of the Caddo tribe endorsed the Spanish and American compromise of the Neutral Ground, or a strip of land “that would be off-limits to soldiers from either nation pending a final diplomatic settlement.” The Caddo helped maintain peace in the Neutral Ground and were able to carve out diplomatic agency in this role. However, this political influence was threatened with Louisiana statehood in 1812, the annexation of Florida, and the repulsion of the British from New Orleans in 1815.
Explanation: Sorry , I couldn't think of a SECOND (Sorry again for the emphasis) way the Natives impacted Louisiana before the states bought it. However, I hope that it will help you.