The area currently occupied by the U.S. State of New Mexico has undergone numerous changes in occupancy and territorial claims and designations. This geographic chronology traces the territorial evolution of New Mexico.
The area currently occupied by the U.S. State of New Mexico has undergone numerous changes in occupancy and territorial claims and designations. This geographic chronology traces the territorial evolution of New Mexico.
Santa Fe de Nuevo México 
La Louisiane La Luisiana 
Louisiana Purchase District of Louisiana 
Louisiana Territory 
Arkansaw Territory Missouri Territory 
Mexican Empire 
Republic of Texas U.S. provisional government of New Mexico State of Deseret 
New Mexico Territory 
Confederate Territory of Arizona State of New Mexico 
The Treaty of Guadalupe Hidalgo, officially the Treaty of Peace, Friendship, Limits, and Settlement between the United States of America and the Mexican Republic, is the peace treaty that was signed on 2 February 1848, in the Villa de Guadalupe Hidalgo between the United States and Mexico that ended the Mexican–American War (1846–1848). The treaty was ratified by the United States on 10 March and by Mexico on 19 May. The ratifications were exchanged on 30 May, and the treaty was proclaimed on 4 July 1848.
The Mexican Cession is the region in the modern-day southwestern United States that Mexico ceded to the United States in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican–American War. This region had not been part of the areas east of the Rio Grande that had been claimed by the Republic of Texas, though the Texas annexation resolution two years earlier had not specified the southern and western boundary of the new state of Texas. At roughly 529,000 square miles (1,370,000 km2), the Mexican Cession was the third-largest acquisition of territory in U.S. history, surpassed only by the 827,000-square-mile (2,140,000 km2) Louisiana Purchase and the 586,000-square-mile (1,520,000 km2) Alaska Purchase.
The District of Louisiana, or Louisiana District, was an official and temporary United States government designation for the portion of the Louisiana Purchase that had not been organized into the Territory of Orleans or "Orleans Territory". The district officially existed from March 10, 1804, until July 4, 1805, when it was incorporated as the Louisiana Territory.
The territory of the United States and its overseas possessions has evolved over time, from the colonial era to the present day. It includes formally organized territories, proposed and failed states, unrecognized breakaway states, international and interstate purchases, cessions, and land grants, and historical military departments and administrative districts. The last section lists informal regions from American vernacular geography known by popular nicknames and linked by geographical, cultural, or economic similarities, some of which are still in use today.
The following outline is provided as an overview of and topical guide to the U.S. state of Montana:
The following outline is provided as an overview of and topical guide to the U.S. state of Kansas:
The following outline is provided as an overview of and topical guide to the U.S. state of New Mexico:
The following outline is provided as an overview of and topical guide to the U.S. state of Oklahoma:
The following outline is provided as an overview of and topical guide to Texas:
The following outline is provided as an overview of and topical guide to the U.S. state of Wyoming:
The following outline traces the territorial evolution of the U.S. State of Wyoming.
The following chronology traces the territorial evolution of the U.S. State of Montana.
The following timeline traces the territorial evolution of the U.S. State of Utah.
The following timeline traces the territorial evolution of the U.S. State of Arizona.
The following timeline traces the territorial evolution of California, the thirty-first state admitted to the United States of America, including the process of removing Indigenous Peoples from their native lands, or restricting them to reservations.
The following outline traces the territorial evolution of the U.S. State of North Dakota.
The following outline traces the territorial evolution of the U.S. State of South Dakota.
The 1763 Treaty of Paris ended the major war known by Americans as the French and Indian War and by Canadians as the Seven Years' War / Guerre de Sept Ans, or by French-Canadians, La Guerre de la Conquête. It was signed by Great Britain, France and Spain, with Portugal in agreement. Preferring to keep Guadeloupe, France gave up Canada and all of its claims to territory east of the Mississippi River to Britain. With France out of North America this dramatically changed the European political scene on the continent.
A Spanish military fort was constructed and occupied in 1819 near Sangre de Cristo Pass in the present U.S. State of Colorado to protect the Spanish colony of Santa Fe de Nuevo México from a possible invasion from the United States. The fort was the only Spanish settlement in present-day Colorado. The site of this fort is known today as the Spanish Fort.
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