
The Aztec Empire, or the Triple Alliance, was an alliance of three Nahua altepetl city-states: Mexico-Tenochtitlan, Texcoco, and Tlacopan. These three city-states ruled the area in and around the Valley of Mexico from 1428 until the combined forces of the Spanish conquistadores and their native allies under Hernán Cortés defeated them in 1521.

The Empire of Brazil was a 19th-century state that broadly comprised the territories which form modern Brazil and Uruguay. Its government was a representative parliamentary constitutional monarchy under the rule of Emperors Dom Pedro I and his son Dom Pedro II. A colony of the Kingdom of Portugal, Brazil became the seat of the Portuguese colonial Empire in 1808, when the Portuguese Prince regent, later King Dom João VI, fled from Napoleon's invasion of Portugal and established himself and his government in the Brazilian city of Rio de Janeiro. João VI later returned to Portugal, leaving his eldest son and heir, Pedro, to rule the Kingdom of Brazil as regent. On 7 September 1822, Pedro declared the independence of Brazil and, after waging a successful war against his father's kingdom, was acclaimed on 12 October as Pedro I, the first Emperor of Brazil. The new country was huge, sparsely populated and ethnically diverse.

Chimor was the political grouping of the Chimú culture that ruled the northern coast of Peru beginning around 850 and ending around 1470. Chimor was the largest kingdom in the Late Intermediate period, encompassing 1,000 kilometres (620 mi) of coastline. The greatest surviving ruin of this civilization is the city of Chan Chan located 4 kilometres (2.5 mi) northwest of the modern Trujillo, Peru.

The Comancheria or Comanchería is the region of New Mexico, west Texas and nearby areas occupied by the Comanche before the 1860s.

The First Empire of Haiti, officially known as the Empire of Haiti, was an elective monarchy in North America. Haiti was controlled by France before declaring independence on January 1, 1804. The Governor-General of Haiti, Jean-Jacques Dessalines, created the empire on September 22, 1804. After being proclaimed emperor by the Generals of the Haitian Revolution Army, he held his coronation ceremony on October 6 and took the name Jacques I. The constitution of May 20, 1805, set out the way the empire was to be governed, with the country split into six military divisions. The general of each division corresponded directly with the emperor or the general in chief appointed by the emperor. The constitution also set out the succession to the throne, with the crown being elective and the reigning emperor having the power to appoint his successor. The constitution also banned white people, with the exception of naturalised Germans and Poles, from owning property inside the empire.

The Inca Empire, also known as the Incan Empire and the Inka Empire, was the largest empire in pre-Columbian America. The administrative, political and military center of the empire was in the city of Cusco. The Inca civilization arose from the Peruvian highlands sometime in the early 13th century. Its last stronghold was conquered by the Spanish in 1572.

The Neo-Inca State, also known as the Neo-Inca state of Vilcabamba, was the Inca state established in 1537 at Vilcabamba by Manco Inca Yupanqui. It is considered a rump state of the Inca Empire (1438–1533), which collapsed after the Spanish conquest in the mid-1500s. The Neo-Inca State lasted until 1572, when the last Inca stronghold was conquered, and the last ruler, Túpac Amaru, was captured and executed, thus ending the political authority of the Inca state.

The Tarascan state was a state in pre-Columbian Mexico, roughly covering the geographic area of the present-day Mexican state of Michoacán, parts of Jalisco, and Guanajuato. At the time of the Spanish conquest, it was the second-largest state in Mesoamerica.

The Second Empire of Haiti, officially known as the Empire of Haiti, was a state which existed from 1849 to 1859. It was established by the then-President, former Lieutenant General and Supreme Commander of the Presidential Guards under President Riché, Faustin Soulouque, who, inspired by Napoleon, declared himself Emperor Faustin I on August 26, 1849 at the Cathedral of Our Lady of the Assumption in Port-au-Prince. Faustin's unsuccessful invasions in an attempt to reconquer the Dominican Republic, which declared independence from Haiti in 1844, undermined his control over the country.

The Tiwanaku State was a Pre-Columbian polity in western Bolivia based in the southern Lake Titicaca Basin. Tiwanaku was one of the most significant Andean civilizations. Its influence extended into present-day Peru and Chile and lasted from around 550 to 1000 AD. Its capital was the monumental city of Tiwanaku, located at the center of the state's core area in the southern Lake Titicaca Basin. This area has clear evidence for large-scale agricultural production on raised fields that probably supported the urban population of the capital. Researchers debate whether these fields were administered by a bureaucratic state (top-down) or through collaboration of a segmented state or federation with local autonomy. One obsolete theory suggests that Tiwanaku was an expansive military empire, based on comparisons to the later Inca Empire, but supporting evidence is weak.

The Wari Empire was a political formation that emerged around 600 AD in the central highlands of Peru and lasted for about 500 years, to 1100 AD. It operated about the same time as the Tiwanaku culture and at one time was thought to have been derived from it. In 2008 archeologists found a prehistoric city, the Northern Wari ruins, also called Cerro Pátapo, near modern Chiclayo. The find was the first to show an extensive settlement related to the Wari culture that far north and demonstrate that they had a long span of influence.

The Zapotec civilization was an indigenous pre-Columbian civilization that flourished in the Valley of Oaxaca in Mesoamerica. Archaeological evidence shows that their culture originated at least 2,500 years ago. The Zapotec archaeological site at the ancient city of Monte Albán has monumental buildings, ball courts, magnificent tombs and grave goods, including finely worked gold jewelry. Monte Albán was one of the first major cities in Mesoamerica. It was the center of a Zapotec state that dominated much of the territory which today is known as the Mexican state of Oaxaca.