legs ( i think u can give it a shot tho)
It can. The mexican-american war also dealt with the future of the territories that were involved like the Texas territory. Since the United States won the territories from Mexico, the new colonies wanted to be slave colonies, and the general government disliked this. There would've been fewer slave colonies if they hadn't been conquered.
I believe the answer is c.1920. However, I could be wrong.
Probably angry because our military sucks