ANSWER: The Spanish Imperials lost against the USA, not the Mexicans. The correct history title of the Mexican-American War is "The Spanish-American War", again... not the Mexican American War.
The New history title is more than misleading, it switches out the very opponents and blames the natives for the wars on the United States. Mexicans who are the tanned (brown) peoples of Mexico were not running the campaigns to take over land and tax, their conflicts were mostly internal or between other Native American peoples. The Spanish still today propagate that they conquered South America, but were never able to take over the large in number natives.
Only Catholic missionaries could keep locals happy by giving aid, clothes, blessings, and free catholic schools taught free Spanish language lessons, with free lunches. The Catholic Missionaries (the church orders) were also not under the authority of the Spanish Imperials, and their work reports to religious order. Native Mexicans more favored the church over the Imperials, and so Spanish language spread with Catholicism, not with Spanish conquest.
"If there is one thing about the Spanish, it takes them about 100 years to recover, and they return only if they are not forced into submission. It's actually strange that a people only respect their abusers. They have never waged war on Rome Italy for it's Catholic Invasions into Spain."
Mexican or Spanish?
The Mexican people seen today 2017 in the USA (Native settlers) are not the Euro-Spanish and have never been defeated in an international War with the USA. The Cowboy gangs (first organized crime in the states) that were famous in the Southern regions of the USA in Wild-West times, were Mexican run gangs (red-sash wearers), and the Cowboy culture remains a huge part of country American lifestyle.
"The Spanish are some of the biggest exaggerators in history, a people who have never taken education seriously for anything more than a way to tease their neighbors, or drink a toast too. The Spanish are the most invaded people of Europe, their southern coastal beaches always in trade disputes being so close to Muslim North Africa, and they have a slave history in Rome (The Roman Italian Catholics), being used as gladiator entertainment 2000 years ago by invading powers. Spanish arms along with their Sail ships and tech come from Muslim occupation."