Very interesting Craig!
There are many places in Texas, and in the Southwest in general, that are referred to as "No man's Land", but this was likely the first.
Found some interesting reading on this area when I looked it up.
(I have always heard the story that the "Redbone Hound" was bred specifically for hunting in "no man's land" so....guess what I found? A people(s) of French Ancestry that might possibly lead credence to the old Redbone Hound story, but that is for another thread at a later time.)
For anyone from Tejas who may be interested in this story, I found the following.
No Mans Land...
The precise boundaries of the area has still not been determined. The United States, having purchased the territory from France, claimed the same boundaries France had claimed before the transfer to Spain. In fact, the U.S. asserted a claim to the Rio Grande as the western border, based on the temporary settlement by René-Robert Cavelier, Sieur de La Salle in Texas in 1684. The more serious U.S. claim, however, was to the Sabine River, today's boundary between the U.S. states of Louisiana and Texas. Spanish claims were the same as before — to Arroyo Hondo.
Negotiations to resolve the dispute broke down in 1805 when Spain severed diplomatic relations with the United States. From October 1805 until October 1806, there was continual skirmishing, both verbal and military, around the Sabine River. There were rumors that both sides were amassing troops near the disputed area.
Neither side, however, wanted to go to war over the dispute. In order to avert further armed clashes, U.S. General James Wilkinson and Spanish Lt. Col. Simón de Herrera, the two military commanders in the region, signed an agreement declaring the disputed territory Neutral Ground (November 5, 1806), until the boundary could be formally established by their respective governments. The agreement was not a treaty and was not ratified by either government, although it was largely respected. Even with this agreement, the boundaries of the Neutral Ground were not entirely specified.
The Arroyo Hondo and the Sabine River were named the eastern and western boundaries, respectively. The southern boundary was undoubtedly the Gulf of Mexico, and it can be assumed that the northern boundary was the thirty-second parallel, approximately. It included portions of the present-day Louisiana parishes of De Soto, Sabine, Natchitoches, Vernon, Rapides, Beauregard, Allen, Calcasieu, Jefferson Davis, and Cameron.
The area covered by the agreement was declared off-limits to soldiers of both countries. The agreement also stipulated that no settlers would be permitted in the Neutral Ground. Nevertheless, settlers from New Spain and the United States territory began to move in. Some American settlers took Spanish land grants known as the Rio Hondo claims. Others simply squatted on unclaimed land. This lawless area also attracted exiles, deserters, political refugees, fortune hunters, and a variety of criminals. Eventually, the highwaymen organized to the degree that they manned outposts and organized spies in order to better fleece travelers and avoid the American and Spanish military. In 1810 and again in 1812 the two governments sent joint military expeditions into the area to expel outlaws.
The Neutral Ground was settled in part by people of mixed-race informally called Redbones. Some of their family surnames can be traced back to African Americans who were free in Virginia and North Carolina during the colonial period. The origins and ancestry of Redbones continues to be debated. During the years of migration from the Upper South, it is likely that some Native Americans also married into the community.
The Adams-OnÃs Treaty, signed in 1819 and ratified in 1821, recognized the U.S. claim, setting the border at the Sabine River. Spain surrendered any claim to the area. (Two years after the treaty was negotiated, New Spain won its independence as the Mexican Empire.) Even after the treaty, however, the Neutral Ground and the adjacent part of East Texas remained largely lawless. The Regulator-Moderator War in East Texas in 1839-44 had its roots in the earlier anarchy of the Neutral Ground.
Uncle Russ...