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Mexican-American War 1846-1848

Interactive passage with audio narration, comprehension questions, and printable PDF.

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Format: Interactive (Online), Printable (PDF)
Grades: 678
Subjects: readinghistoryela
Standards: D2.HIS.2.3-5D2.HIS.3.3-5RI.4.3RI.4.4W.4.2
Languages: English, Spanish

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What's included

Reading passage

Reading comprehension

Audio narration

With word word highlighting

Comprehension quiz

Auto-graded

Writing activity

Open-ended response

Glossary & flashcards

Vocabulary practice

Differentiated version

Adapted for varied levels

Spanish translation

Bilingual support

About this reader

This rigorous U.S. history reading passage invites students to analyze the causes, motivations, and consequences of the Mexican-American War (1846-1848), focusing on whether the war was justified. Students will examine multiple perspectives, including those of the U.S. government, Mexican leaders, and critics of the conflict. The passage is carefully structured to develop students’ historical reasoning and evidence-based argumentation, while integrating key academic vocabulary and a primary source excerpt. Activities include a multiple-choice quiz, explanatory writing prompts, a T-Chart graphic organizer comparing perspectives, and a timeline of key events. A glossary and Spanish translation support comprehension for all learners. The content is aligned with C3 Framework History standards (D2.His.2.3-5, D2.His.3.3-5) and Common Core ELA standards (RI.4.3, RI.4.4, W.4.2), and is ideal for developing students’ skills in analysis, comparison, and critical thinking. Includes read aloud audio and Spanish translation for accessibility.

Written by Workybooks TeamPublished by Workybooks

Sample passage and quiz content

CONTENT PREVIEW

"Battle of Churrubusco" / Library of Congress.

The Mexican-American War took place between 1846 and 1848, shaping the future boundaries of the United States and Mexico. The conflict began after the United States annexed Texas, an area that both nations claimed as their own. This led to a serious dispute over the boundary between Texas and Mexico, especially the land between the Nueces River and the Rio Grande. The United States considered the Rio Grande as the official border, while Mexico recognized the Nueces River as the boundary.

Tension grew as both sides sent troops into the disputed territory. In April 1846, fighting broke out when Mexican soldiers attacked U.S. troops north of the Rio Grande. President James K. Polk asked Congress to declare war on Mexico, arguing that American blood had been shed on American soil. Congress agreed, and the two nations were soon at war. The conflict involved many battles across what is now Texas, California, and the Southwest.

The U.S. military, with better supplies and organization, won most major battles, including the capture of Mexico City in September 1847. Some Americans believed in the idea of Manifest Destiny—the belief that the United States was destined to expand across the continent. This idea encouraged westward expansion but also created tension and hardship for Native American and Mexican communities living in the region.

The war ended in 1848 with the signing of the Treaty of Guadalupe Hidalgo. According to the treaty, Mexico gave up a vast area of land known as the Mexican Cession, which included present-day California, Nevada, Utah, Arizona, and parts of Colorado, New Mexico, and Wyoming. In return, the United States paid Mexico $15 million and agreed to protect the rights of Mexican citizens living in the new territories. However, in reality, many former Mexican citizens faced discrimination and the loss of land.

The results of the Mexican-American War were far-reaching. The United States increased its territory by about one-third, fulfilling many Americans’ dreams of a nation stretching from the Atlantic to the Pacific. At the same time, the new territories raised difficult questions about the expansion of slavery, leading to rising tensions between the North and South. Mexican families, Native Americans, and other groups experienced displacement and hardship as a result of the new boundaries and laws.

The cession of land created opportunities for some, but also conflict and suffering for others. The war’s legacy is a complex one, showing how national ambitions can lead to both growth and struggle. By examining primary sources and multiple perspectives, historians continue to debate the justification and impact of the conflict today.

Interesting Fact: The Treaty of Guadalupe Hidalgo added more than 500,000 square miles to the United States, about the size of Western Europe, making it one of the largest land acquisitions in U.S. history.

When did the Mexican-American War occur?

1846-18481861-18651812-18151775-1783

What treaty ended the war?

Treaty of ParisTreaty of Guadalupe HidalgoMissouri CompromiseAdams-Onís Treaty

Which state was NOT part of the Mexican Cession?

CaliforniaNevadaTexasUtah

Why did the war start?

Trade argumentsDisputed territoryGold discoveryElection dispute

What was Manifest Destiny?

A peace treatyA belief in westward expansionA gold rushA Mexican law

What did the United States gain?

More territoryA new presidentIndependenceTrade rights

The war ended in 1848. True or false?

TrueFalse

What does 'cession' mean?

Giving up landMaking a lawMoving peopleWinning a battle

Common Core standards covered

RI.4.3

Explain events, procedures, ideas, or concepts in a historical, scientific, or technical text, including what happened and why, based on specific information in the text.

RI.4.4

Determine the meaning of general academic and domain-specific words or phrases in a text relevant to a grade 4 topic or subject area.

W.4.2

Write informative/explanatory texts to examine a topic and convey ideas and information clearly.