The flags of the U.S. states, territories, and the District of Columbia exhibit a variety of regional influences and local histories, as well as different styles and design principles. Modern U.S. state flags date from the turn of the 20th century, when states considered distinctive symbols for the 1893 World's Columbian Exposition in Chicago, Illinois. Most U.S. state flags were designed and adopted between 1893 and World War I.
The Mexican Cession is the region in the modern-day western United States that Mexico previously controlled, then 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, which had been claiming independence since its Texas Revolution of 1836 and subsequent brief war for independence, followed afterwards a decade later by the American annexation and admitted statehood in 1845. It had not specified the southern and western boundary of the new state of Texas with New Mexico consisting of roughly 529,000 square miles (1,370,000 km2), not including any Texas lands, 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 of 1803 and the later 586,000-square-mile (1,520,000 km2) Alaska Purchase from Russia in 1867.
The Territory of Wyoming was an organized incorporated territory of the United States that existed from July 25, 1868, until July 10, 1890, when it was admitted to the Union as the State of Wyoming. Cheyenne was the territorial capital. The boundaries of the Wyoming Territory were identical to those of the modern State of Wyoming.
The Territory of Missouri was an organized incorporated territory of the United States that existed from June 4, 1812, until August 10, 1821. In 1819, the Territory of Arkansas was created from a portion of its southern area. In 1821, a southeastern portion of the territory was admitted to the Union as the State of Missouri, and the rest became unorganized territory for several years.
The National Register of Historic Places in the United States is a register including buildings, sites, structures, districts, and objects. The Register automatically includes all National Historic Landmarks as well as all historic areas administered by the U.S. National Park Service. Since its introduction in 1966, more than 97,000 separate listings have been added to the register.
The trans-Mississippi theater of the American Civil War was the scene of the major military operations west of the Mississippi River. The area is often thought of as excluding the states and territories bordering the Pacific Ocean, which formed the Pacific coast theater of the American Civil War (1861–1865).
The timeline of Kansas details past events that happened in what is present day Kansas. Located on the eastern edge of the Great Plains, the U.S. state of Kansas was the home of sedentary agrarian and hunter-gatherer Native American societies, many of whom hunted American bison. The region first appears in western history in the 16th century at the time of the Spanish conquest of the Aztec Empire, when Spanish conquistadors explored the unknown land now known as Kansas. It was later explored by French fur trappers who traded with the Native Americans. It became part of the United States in the Louisiana Purchase of 1803. In the 19th century, the first American explorers designated the area as the "Great American Desert."
The following outline is provided as an overview of and a topical guide to the history of the United States.
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 Missouri:
The following outline is provided as an overview of and topical guide to the U.S. state of North Dakota:
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 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.
There have been many United States historical military districts. Domestically, the United States Armed Forces has had military districts ranging from 1798 to 1881. They were reorganized several times: in 1800, in 1813, in 1815, in 1821, in 1837, in 1844, in 1848, in 1861, and in 1865. Internationally, military districts included Cuba, the Allied Military Government of Occupied Territories, South Korea, the Trust Territory of the Pacific Islands, and the Ryukyu Islands of Japan.
