U.S. rule
New Mexico in 1850 had a population of 56,223 mostly Spanish-speaking Indigenous Hispanos and detribalized Native Americans ("
genizaros"), and including about 10,000 Puebloans. A salient fact is that it was an austere land in which sources of potential wealth were scarce—with the exception of land and mining—for an increasing population of Whites and Hispanos. Ownership of land was the vehicle for wealth and prominence in the American territory of New Mexico (1848–1912). The United States agreed in the
Treaty of Guadalupe Hidalgo (1848) that all residents of former Mexican territory had the right of "retaining the property which they possess in the said territories, or disposing thereof, and removing the proceeds wherever they please." The history in New Mexico and southern Colorado of land grants since the treaty consists of attempts to reconcile U.S. land laws with those of Mexico and adjudicating disputes between grant owners and claimants and the largely
Anglo new arrivals to the territory and state. These disputes have continued into the 21st century. In the legal controversies about land grants and their owners, millions of acres of land have ended up as the property of wealthy Anglos or in the public domain, mostly as
National Forests, of the United States. In 1854, the U.S. established the Office of the Surveyor General for New Mexico to investigate land grants and recommend their disposition to the U.S. Congress. Claimants of land grants had to petition the Surveyor General to confirm their grant, but the claimants often did not speak English and were suspicious of and unfamiliar with the American legal system—so different from Spanish and Mexican systems. Many of the claimants were poor and unable to pursue the lengthy and expensive legal process of getting a claim confirmed. Moreover, the first and succeeding Surveyors General had little knowledge of Hispano land practices and customs. "The situation was ripe for fraud." The shortcomings of the Office of Surveyor General resulted in the creation by the U.S. government of the Court of Private Land Claims in 1891 which established an adversarial system in which a panel of five judges decided land grant disputes. However, the attorney's office representing the United States had far greater legal resources than the claimants. In 1897, the
U.S. Supreme Court made a ruling which also disadvantaged claimants. Title to the common lands of Spanish and Mexican land grants, the court decided, was held by the sovereign,
i.e. the government of the United States. The consequences of losing access to resources on former common lands were severe for many Hispano settlements. The small garden plots individuals and families retained were inadequate for their subsistence. Hispanos resisted the land policies of the United States. Among the movements and events at least partially related to land disputes were the
Taos Revolt (1847), which saw the murder of several large land grantees. Attempts to expel both Hispano and Anglo settlers from the Maxwell Land Grant resulted in violent resistance from 1866 until 1899. Causes of the famous
Lincoln County War (late 1860s to 1881), involving, among others,
Billy the Kid; and the
Colfax County War (1873–1888) included land disputes.
Las Gorras Blancas (the White Caps) in
San Miguel County from the 1880s until the 1920s cut pasture fences and committed several violent acts. The shadowy La Mano Negra (the Black Hand) flourished in
Rio Arriba County in the 1920s and 1930s to protest Anglo ownership of the former common lands of the
Tierra Amarilla Land Grant. In 1967, the
Alianza Federal de Mercedes, led by
Reies Tijerina, raided the Rio Arriba County Courthouse. The objective was to make a
citizen's arrest of the district attorney "to bring attention to the unscrupulous means by which government and Anglo settlers had usurped Hispanic land grant properties." An armed struggle resulted in which two persons were wounded and Tijerina was arrested and sentenced to prison. In 2014, also in Rio Arriba County, the
Forest Service was accused of using "Gestapo-like tactics" to prevent local residents from accessing the National Forest for traditional uses such as grazing livestock. In Colorado in 2021, a judge settled a long-running dispute in which descendants of settlers on the
Sangre de Cristo Land Grant sued for access to the former common lands of the grant (the property of an Anglo rancher) by deciding in favor of the descendants. ==Notable land grants in New Mexico and Colorado==