Ethnically , instead of the gradually increasing hispanisation of America ( Especially after the late sixties) ( and before you flame me , thiry percent of Americans do consider themselves Hispaniac) , America would have largely remained Anglo-Saxon / Germaniac Dominated .
Personally , I'm of the opinion that the Mexican Insurgency is grossly over exegerated . Firstly , most of the insurgencies took on different guises- from Anarchist Bandits , to Ultra Nationalist , the Fascist , followed by Communist rebels , and finally the Anti Imperialist , most of them have proven massive flops . Che Guvera's rebellion only lasted around 1 month ( and five days) before American troops chased him out of Mexico .
The Chiapas rebels have been thoroughly crushed after trying to do a Villa and crossing into Federal territory last year by General Patraeus .
OOC:I know , I know , Chaos theory dictates that Patraeus should'nt even exist - most Americans as we know it will be butterflied away throughly .
BOT ( Back on topic): In any case , most of the trouble comes from across the border usually . There has been only one actual insurgency in the Mexican South of USA , and that was immediately after the Mexican - American war . True , the internment camps of the USA were equally reprehensible , just as the British treatment of the Boers , but beyond those five years , the Mexican South has been largely peaceful , save for drug trafficking within the last decade ( the war on Drugs reached Martial Law at one point during the Chiapas Incursion last year , remember ?)
Finally , there's no way the US could have lost . Industrially , and economically , it was many orders of magnitude superior to Mexico . Secondly , Piarie warfare would have decimated any Mexican army ( If the national guard did not get to it first) .
OOC: This is a DBWI , Please refrain from contradicting another earlier post without good reason to do so.