But think about it - we went in and took more than half of Mexico from the Mexicans now more than a century later we are all in a tizzy that Mexican migrants are crossing the border.
Im not condoning illegal immigration, but we gotta step back as U.S. citizens and realize that our country did take a piece of Mexico when we occupied Mexico City and forced them to give up their land.
Here is a more correct map of 1840 United States.
Establishing Borders: Map 1 A
Not all of that territory shown in the Absolut ad belonged to Mexico. There was a lot of disputed territory and there was also unrecognized territory that no one claimed, as well as territory that the US and Britain both claimed.
The Republic of Texas did not want to be a part of either nation, but wanted to be it's own sovereign nation. But in the end Mexico lost to the US and the Republic of Texas also lost to the US so Texas was integrated (not sure if thats the right word Im looking for) into the United States and it became the State of Texas, where as a state it could make its own laws for that specific state but it also had to abide by the Federal laws that were enforced for the whole nation. Texas didnt put up much of a fit though because they realized they had more 'freedom' being with the United States and not to mention the added protection of the US Army should Mexico decide to raid.