The area covered by the agreement has been declared off-border for soldiers from both countries. The agreement also provided that no settlers would be allowed in neutral soil. However, settlers from New Spain and the United States began to move in. After the territory was recognized as part of the United States, these settlers obtained third-class rights.  (Those with Spanish land subsidies prior to the sale of Louisiana Purchase to the United States obtained first-rate claims.) Some of the U.S. settlers would form the nucleus of the Louisiana Redbone community. This lawless area has also attracted exiles, deserters, political refugees, luck-hunters and a multitude of criminals. Finally, highway drivers organized to the point of occupying outposts and organizing spies to better escape travelers and avoid the American and Spanish military.  In 1810 and 1812, both governments sent joint military expeditions into the territory to drive out outlaws.
Therefore, until 1821, the Neutral Ground existed outside the government of the United States or Spain.  Although the agreement stipulated that no settlers should be allowed in neutral soil, settlers moved from Spanish and American territory.  The question of the official border between Louisiana and Texas depended on the fact that Spain and France had not officially settled the matter until 1763. Instead, the Spanish commander of the Los Adaes presidency and the French commander of Natchitoches agreed on a gentleman`s agreement. They established a demarcation line from the Gulf of Mexico, between the Calcasieu and Mermenteau rivers, to Arroyo Hondo, then north of Natchitoches and the Red River. When Louisiana ceded to Spain, the border issue became an internal and Spanish provincial governor of Cuba, responsible for Louisiana, and the governor of the inland provinces, responsible for Texas, accepted the demarcation line between Louisiana and Texas. After the U.S. purchased Louisiana, U.S. officials, including President Thomas Jefferson, argued that the Rio Grande was the limit on Louisiana`s purchase. Many Americans who were in terms of territorial expansion joined this claim in the province of Texas. The neutral land agreement did not provide a solution to the border issue, either for the United States or Spain.
At best, it mitigated the situation. But in the absence of an international treaty, it has served all parties involved. In the broader context of relations between nations, the compromise provided an exceptional and valuable insight into the unique role played by the Louisiana-Texas border regions in reshaping political and diplomatic practices. Far from the seats of power, the leaders of both sides of the Sabine broke with the convention to find a peaceful solution to a number of critical issues in a situation where normal diplomatic channels have failed. By concluding the agreement as they, Wilkinson and Herrera e., also for practical reasons, all American efforts, Texas as part of the Louisiana Purchase by moving the center of gravity of the negotiations from the Rio Grande to the Sabine. The most important thing is that both the United States and Spain have accepted the agreement that served to restart diplomatic talks between the two sides. In a very real sense, local diplomacy triumphed where international diplomacy failed and provided unique solutions to a complex set of problems on the frontier of empires, with Spain and the United States grappling with a changing paradigm in which neither had undisputed control. For many years, Spain looked at what it considered to be an invading Frenchman from Louisiana to Texas. Around 1734, the French moved their post to Natchitoches on the east side to the west side of the Red River.