The Mexican-American War began in the year 1846. To find the answer to this question, you can use various resources such as history books, encyclopedias, or trustworthy online sources. One reliable source to use is the official website of the U.S. government, which provides accurate information on historical events. Additionally, you can consult reputable history textbooks or conduct a search using search engines like Google, making sure to cross-reference information from multiple sources to ensure accuracy.
