Mexico (ⁱ/ˈmɛksɨkoʊ/; Spanish: México, IPA: [ˈmexiko] ( listen)), officially the United Mexican States (Spanish:  Estados Unidos Mexicanos (help·info)), is a federal constitutional republic in North America. It is bordered on the north by the United States of America; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of Mexico. Covering almost two million square kilometres (over 760,000 sq mi), Mexico is the fifth largest country in the Americas by total area and the thirteenth largest independent nation in the world. With an estimated population of over 113 million, it is the eleventh most populous country and the most populous Spanish-speaking country. Mexico is a federation comprising thirty-one states and a Federal District, the capital city.

In Pre-Columbian Mexico many cultures matured into advanced civilizations such as the Olmec, the Toltec, the Teotihuacan, the Zapotec, the Maya and the Aztec before the first contact with Europeans. In 1521, Spain conquered and colonized the territory from its base in México-Tenochtitlan, which was administered as the Viceroyalty of New Spain. This territory would eventually become Mexico as the colony's independence was recognized in 1821. The post-independence period was characterized by economic instability, the Mexican-American War and territorial cession to the United States, a civil war, two empires and a domestic dictatorship. The latter led to the Mexican Revolution in 1910, which culminated with the promulgation of the 1917 Constitution and the emergence of the country's current political system. Elections held in July 2000 marked the first time that an opposition party won the presidency from the Institutional Revolutionary Party.

The United Mexican States (Spanish: Estados Unidos Mexicanos) is a federal republic formed by 32 federal entities (Spanish: entidades federativas) (31 states and 1 federal district).

According to the Constitution of 1917, the states of the federation are free and sovereign. Each state has its own congress and constitution, while the Federal District has only limited autonomy with a local Congress and government. The territory of the Federal District commonly known as Mexico City serves as the national capital.

On September 27, 1821, after three centuries of Spanish rule, Mexico gained its independence. The Treaty of Córdoba recognized part of the Viceroyalty of New Spain as an Independent Empire, which was recognized as "Monarchist, constitutional and moderate." The new country took the name of Mexican Empire.

A minority of the Constituent Congress, looking for stability, elected Agustín de Iturbide as emperor. On July 21, 1822, Iturbide was crowned Emperor of Mexico. However, the Constitutional Empire quickly demonstrated the incompatibility of its two main parts: the Emperor and the Constituent Congress. The deputies were imprisoned just for expressing their opinions and finally, Iturbide decided to dissolve the Congress and establish instead a National Board.

The Cherokee Nation (ᏣᎳᎩᎯ ᎠᏰᎵ or Tsalagihi Ayeli) is the largest of three Cherokee federally recognized tribes in the United States. It was established in the 20th century, and includes people descended from members of the old Cherokee Nation who relocated voluntarily from the Southeast to Indian Territory and Cherokees who were forced to relocate on the Trail of Tears. The tribe also includes descendents of Cherokee Freedmen and Natchez Nation. Over 299,862 people are enrolled in the Cherokee Nation, with 189,228 living within the state of Oklahoma. According to Bureau of Indian Affairs (BIA) head Larry EchoHawk, the Cherokee Nation is not the historical Cherokee tribe but instead a "successor in interest."

Headquartered in Tahlequah, Oklahoma, the Cherokee Nation has a tribal jurisdictional area spanning 14 counties in the northeastern corner of Oklahoma. These are Adair, Cherokee, Craig, Delaware, Mayes, McIntosh, Muskogee, Nowata, Ottawa, Rogers, Sequoyah, Tulsa, Wagoner, and Washington Counties.

The Mexican Revolution (Spanish: Revolución mexicana) was a major armed struggle that started in 1910, with an uprising led by Francisco I. Madero against longtime autocrat Porfirio Díaz, and lasted for the better part of a decade until around 1920. Over time the Revolution changed from a revolt against the established order to a multi-sided civil war. This armed conflict is often categorized as the most important sociopolitical event in Mexico and one of the greatest upheavals of the 20th century.

After prolonged struggles, its representatives produced the Mexican Constitution of 1917. The Revolution is generally considered to have lasted until 1920, although the country continued to have sporadic, but comparatively minor, outbreaks of warfare well into the 1920s. The Cristero War of 1926 to 1929 was the most significant relapse into bloodshed.

The Revolution led to the creation of the Partido Nacional Revolucionario ("National Revolutionary Party") in 1929; it was renamed the Partido Revolucionario Institucional (Institutional Revolutionary Party) (PRI) in 1946. Under a variety of leaders, the PRI held power until the general election of 2000.