# Canonical recap data for Mexican-American War Begins (1846)
# Source: https://recap.at/1846/mexican-american-war
# Format: YAML 1.2 (UTF-8). Generated at request time.
slug: mexican-american-war
canonicalUrl: "https://recap.at/1846/mexican-american-war"
title: Mexican-American War Begins
subtitle: The Mexican-American War resulted in the US annexing half of Mexico's territory, establishing American continental dominance and intensifying sectional conflict over slavery expansion.
recapType: global_event
eventStatus: concluded
startDate: 1846-04-24
datePrecision: day
year: 1846
decade: 1840
country:
name: United States / Mexico
slug: usa-mexico
summaryShort: The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the United States intervention in Mexico, was an invasion of Mexico by the United States. It followed the 1845 American annexation of Texas, which Mexico still considered its territory because it refused to recognize the Treat
summaryLong: The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the United States intervention in Mexico, was an invasion of Mexico by the United States. It followed the 1845 American annexation of Texas, which Mexico still considered its territory because it refused to recognize the Treaties of Velasco, signed by President Antonio López de Santa Anna after he was captured by the Texian Army during the 1836 Texas Revolution. The Republic of Texas was de facto an independent country, but most of its Anglo-American citizens who had moved from the United States to Texas after 1822 wanted to be annexed by the United States.
heroImageUrl: "https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Nebel_Mexican_War_12_Scott_in_Mexico_City_%28cropped%29.jpg/1280px-Nebel_Mexican_War_12_Scott_in_Mexico_City_%28cropped%29.jpg"
heroImageCredit: Wikipedia · "Mexican–American War"
importance: 79
sourceConfidence: 75
keyFacts: []
timeline: []
sources:
- url: "https://en.wikipedia.org/wiki/Mexican%E2%80%93American_War"
  title: Mexican-American War
  provider: Wikipedia
related: []
categories:
- war
metaDescription: The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the United States intervention in Mexico, was an invasion of Mexic
wikidataQid: Q6683
archiveSnapshots:
- url: "https://web.archive.org/web/20260701102522/https://en.wikipedia.org/wiki/Mexican%E2%80%93American_War"
  capturedAt: 2026-07-01
  label: Mexican-American War
  originalUrl: "https://en.wikipedia.org/wiki/Mexican%E2%80%93American_War"
