Though the war is often relegated to a footnote in many history books, it marked a turning point for the American Army and the United States. It illustrated the need to retain a trained, modernized military during times of peace. Both Union and Confederate forces later used the lessons learned from the Mexican War during the Civil War just over a decade later. The victory also spurred a rise in patriotism and encouraged further Westward expansion while simultaneously intensifying the issue of slavery. The Mexican War subtly but very significantly altered the American territory, and almost certainly would not have been won without the strength of U.S.
Though the war is often relegated to a footnote in many history books, it marked a turning point for the American Army and the United States. It illustrated the need to retain a trained, modernized military during times of peace. Both Union and Confederate forces later used the lessons learned from the Mexican War during the Civil War just over a decade later. The victory also spurred a rise in patriotism and encouraged further Westward expansion while simultaneously intensifying the issue of slavery. The Mexican War subtly but very significantly altered the American territory, and almost certainly would not have been won without the strength of U.S.