are you talking about the time mexico started a war with the united started and lost in only 2 years. the u.s. won the war  mexico ceded 55% of its territory to the u.s.  the u.s. gained the future states of california, nevada, utah, new mexico, arizona, and parts of colorado, oklahoma, kansas, and wyoming  tell me more about what we learned about mexico being a paper tiger and becoming a vassal state
United States