The frontier that St. Denis created at Natchitoches didn't end when the French left. After the Louisiana Purchase in 1803, the United States and Spain couldn't agree on where Louisiana stopped and Texas started. The U.S. claimed the Sabine River. Spain claimed the Arroyo Hondo, a creek in Natchitoches Parish — the same boundary the French and Spanish commandants had drawn by gentleman's agreement decades earlier. In 1806, to avoid a shooting war, U.S. General James Wilkinson and Spanish Lt. Col. Simón de Herrera declared the disputed territory between the two claims a Neutral Ground — no man's land. Neither nation would govern it, police it, or tax it.
The result was predictable. The strip filled with deserters, smugglers, political refugees, fugitives, and outright bandits who organized outposts and spies to fleece travelers and dodge military patrols from both sides. For fifteen years, No Man's Land was the most lawless stretch of ground in North America — a frontier buffer zone where the rules of neither country applied.
The Adams–Onís Treaty of 1819, ratified in 1821, finally set the border at the Sabine River, vindicating the American claim and ending the Neutral Ground. But the strip's reputation lingered for generations. The story starts at Los Adaes, where Spain first drew its line against the French, and it runs through every contested boundary that followed. Natchitoches was always the eastern anchor — the last outpost of order before the frontier went dark.
