Active military intervention
The correct answer is <span>mexico refused to trade land for peace.
Eventually they had to trade the land since the war ended in what is considered by many a stalemate. Of course, the United States got a lot of territories so it was a good stalemate for them and nowadays it is considered to be a victory. Texas also became sovereign and independent.</span>
Basically, the 11th amendments prohibits federal courts from hearing certain lawsuits against states.
Hope this helps :)
Can you please elaborate your question