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[[Image:Texas1803.jpg|thumb|350px|boundary in 1803; "neutral ground" is shaded]]

[[Image:Texas1803.jpg|thumb|350px|boundary in 1803; "neutral ground" is shaded]]

In 1800, Spain returned western Louisiana to France. In the [[Louisiana Purchase]] of 1803 the entire Louisiana territory was sold by France to the U.S. Boundary disputes between the U.S. and Spain soon followed along the Texas border, and in 1806 both nations signed the "Neutral Ground Agreement." Entered into by American and Spanish military commanders, the compact stated that neither country would exercise sovereignty over the land between the Sabine River and the Arroyo Hondo, just west of Natchitoches, in what is now Louisiana. Finally, in 1819 the [[Adams-Onís Treaty]], ratified in 1821, fixed the northern boundary of Spanish Texas at the Sabine River.

In 1800, Spain returned western Louisiana to France. In the [[Louisiana Purchase]] of 1803 the entire Louisiana territory was sold by France to the U.S. Boundary disputes between the U.S. and Spain soon followed along the Texas border, and in 1806 both nations signed the "Neutral Ground Agreement." Entered into by American and Spanish military commanders, the compact stated that neither country would exercise sovereignty over the land between the Sabine River and the Arroyo Hondo, just west of Natchitoches, in what is now Louisiana. Finally, in 1819 the [[Adams-Onis Treaty]], ratified in 1821, fixed the northern boundary of Spanish Texas at the Sabine River.

===American settlers===

===American settlers===