A map of northern and central Mexico and southern United states showing the area of conflict during the Mexican-American War (1846-1848). The map shows the Mexican boundary (under Spain) established by the Louisiana Purchase (1803)...

A map of central Mexico and southern United States showing the important cities and battle sites of the Mexican-American War (1846-1848). The map shows the rivers of the contested boundaries that led to the war, the Rio Grande del Norte...

A map of Mexico and southern United States showing the campaigns and battle sites of the Mexican-American War (1846-1848). The map shows the routes of Taylor, Wool, Kearny, Doniphan, and Scott, the pre-war boundaries of the United States...

An interactive exploration of the Treaty of Guadalupe Hidalgo, which was signed in 1848 and ended the Mexican-American War. Puts the treaty in context, makes reference to U.S. territorial gains, and includes links to larger images, a...

This in-depth resource presents a history of the American West from pre-Columbian times until World War I with profiles, documents, and images. It encourages visitors to link these into patterns of historical meaning for themselves....

Article reviews several conditions of American society that sowed the seeds of civil war, particularly slavery and sectional conflict.

This extensive learning module examines how the United States became more connected with the world as it pursued an expansionist foreign policy, became the destination for many new immigrants, and encouraged migration to the Pacific...

Concisely written accounts of three important events in the history and shaping of Texas: the Annexation of Texas, the Mexican-American War, and the Treaty of Guadalupe-Hidalgo.

This is an online exhibit of photographs and other momentos from throughout the colonization of the Mexican territory as well as during the war.

This is an interesting look at the impact of the Battle of San Jacinto not only for the Republic of Texas, but for places in North America and in Europe. Links to additional information.

This brief biography from San Jacinto Museum hits the high points of Mirabeau Lamar's life as a writer, soldier, and politician.

This online lesson plan shows young scholars through primary sources how the borders of the U.S. changed in just a few years. They are asked to analyze maps and use map skills. All maps and worksheets are included as well as additional...

A map of Mexico and Texas from the annexation of the Republic of Texas by the United States (1845) to the end of the Mexican-American War (1848). The map is color-coded to show the territory of Texas in 1845, the territory of dispute...

This "Teaching with Documents" lesson on Lincoln's spot resolutions explores the Mexican War, Lincoln's questioning of the propriety of the war, and the power of the U.S. President at that time. Content includes extensive historical...

A map of Texas, New Mexico, and northern Mexico showing the principal campaigns and battle sites of the Mexican-American War of 1846-1848.

A map of Mexico and southern United States showing the campaigns and battle sites of the Mexican-American War (1846-1848). The map shows the territory acquired from Mexico after the war, and the routes of Taylor, Wool, Kearny, Doniphan,...

A map of Mexico and southern United States showing the campaigns and battle sites of the Mexican-American War (1846-1848). The map shows the routes of Taylor, Wool, Kearny, Doniphan, and Scott, the pre-war boundaries of the United States...

Describes the significant territorial changes that took place in the United States under the presidency of James K. Polk. These included the annexation of Texas, the settling of the dispute with Great Britain over claims to Oregon...

General Ord, born in Cumberland, Md., October 18th, 1818, died in Havana, Cuba, July 22nd, 1883, was graduated from the United States Military Academy in 1839, and assigned to the Third Artillery. He served with distinction in the...

General George Sykes, born in Dover, Del., October 9th, 1822, died in Brownsville, Texas, February 9th, 1880, was graduated from the United States Military Academy in 1842, and assigned to the Third Infantry; served in the Florida and...

Fort Jesup was built in 1822 to help protect the western border between American and Spanish territories. Under the command of future U.S. President Zachary Taylor, soldiers at the fort monitored Texas as it passed from Spanish and...

A map from 1889 of North America showing the expansion in the region of the United States from the original Thirteen Colonies at the end of the Revolutionary War in 1783 to the time the map was made, around 1889, before the territories...

This is an online exhibit of photographs and other momentos from throughout the colonization of the Mexican territory as well as during the war.

One-page profile of influential innovator, Samuel Colt, whose vision and ideas created the revolving pistol that was later used in the Mexican American War and the Texas Revolution.