The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the Intervención estadounidense en México (U.S. intervention in Mexico), was an armed conflict between the United States and Mexico from 1846 to 1848. It followed the 1845 U.S. annexation of Texas, which Mexico considered Mexican territory because it did not recognize …

Mexican Texas is the historiographical name used to refer to the era of Texan history between 1821 and 1836, when it was part of Mexico.Mexico gained independence in 1821 after winning its war against Spain, which began in 1810.Initially, Mexican Texas operated similarly to Spanish Texas.Ratification of the 1824 Constitution of Mexico created a federal structure, and the …